2010 Baja California earthquake

{{Infobox earthquake

| title = 2010 Baja California earthquake

| timestamp = 2010-04-04 22:40:42

| anss-url = ci14607652

| isc-event = 600257057

| image = April 2010 Baja California earthquake intensity USGS.jpg

| image alt = A large red spot which mark the area where the quake felt stronger. A star marks the epicenter.

| caption = USGS shake map for the mainshock

| map =

| image name =

| map2 = {{Location map+ | USA West |relief = 1

|AlternativeMap = USA Region West landcover location map.jpg

|places =

{{Location map~|USA West|lat=32.72|long=-117.16|label_size=100|label=San Diego|position=left|mark=Green pog.svg}}

{{Location map~|USA West|lat=31.86|long=-116.61|label_size=100|label=Ensenada|position=left|mark=Green pog.svg}}

{{Location map~|USA West|lat=32.13|long=-115.30|mark=Bullseye1.png|marksize=40}}

| width = 260

| float = right

| caption = }}

| map alt = The earthquake's epicenter is shown in northwestern Mexico.

| local-date = April 4, 2010

| local-time = 15:40:41

| duration = 89 seconds

| magnitude = 7.2 {{M|w|link=y}}

| depth = {{convert|10|km|abbr=on}}

| location = {{Coord|32.13|N|115.30|W|display=title,inline|region:MX-BCN_type:event}}

| type = Oblique-slip

| countries affected = {{flagicon|Mexico}} Mexico
{{flagicon|United States}} United States

| damage = $1.15 billion (2010 USD)

| pga = 0.58 g

| pgv = 61 cm/s

| intensity = {{MMI|VII}}

| tsunami = No

| landslide = Yes

| aftershocks = Yes

| casualties = 2–4 dead
100–233 injured

}}

The 2010 Baja California earthquake (also known as 2010 Easter earthquake, 2010 Sierra El Mayor earthquake, or 2010 El Mayor – Cucapah earthquake) occurred on April 4 (Easter Sunday) with a moment magnitude of 7.2 and a maximum Mercalli intensity of VII (Very strong). The shock originated at {{tooltip|15:40:41 local time|22:40:41 UTC}} (3:40:41 PM PDT) south of Guadalupe Victoria, Baja California, Mexico.

The 89-second quake was widely felt throughout northwest Mexico and southern California. It was also the strongest to rock southern California in at least 18 years (since the M 7.3 1992 Landers earthquake), if not longer: the next most recent comparable earthquake—the 1952 Kern County earthquake (M 7.3)—was 58 years earlier. Each of these earthquakes had a similar magnitude, and was also felt across a large swath of North America. Most of the damage occurred in the twin cities of Mexicali and Calexico on the Mexico–United States border.

Geology

The quake originally was believed to have occurred on the Laguna Salada Fault, which is about {{convert|60–80|km|sp=us}} long and straddles the California–Baja California border. The active Laguna Salada Fault ruptured in February 1892 with an estimated {{M|w|link=y}} 7.2 earthquake.(Hough & Elliott, Bulletin of the Seismological Society of America, August 2004, volume 94)

By the distribution of aftershocks and using radar interferometry, the main shock rupture was found to have occurred on a previously unmapped fault in the Cucapah Mountains and beneath the Colorado River Delta. This fault line was named the Indiviso Fault, after the nearby town of El Indiviso.{{cite web|last=Naranjo|first=Laura|title=Baja's Fault|date=November 20, 2011|url=http://earthdata.nasa.gov/featured-stories/featured-research/bajas-fault|publisher=NASA EOSDIS|access-date=November 13, 2012}} A liquefaction zone bounded by the Cerro Prieto Fault and the Laguna Salada Fault was observed.{{Cite web|url=http://www.asf.alaska.edu/news_notes/6-4/m72-el-major-cucapa-earthquake-baja-california|title=M72-el-major-cucapa-quake | Alaska Satellite Facility|access-date=October 28, 2011|archive-date=July 28, 2013|archive-url=https://web.archive.org/web/20130728150641/http://www.asf.alaska.edu/news_notes/6-4/m72-el-major-cucapa-earthquake-baja-california|url-status=dead}}

Timeline

=Foreshocks=

Mexicali, El Centro, San Diego, Ensenada, and Tijuana are situated in a very active seismic zone and surrounded by important faults. An earthquake of such magnitude had been expected around the fault situated in the southeast of Mexicali.{{cite web|url=http://rotativo.com.mx/nacionales/el_sismo_se_esperaba_hace_tiempo_experto/883,33,29404,html|title=El sismo se esperaba hace tiempo: experto|language=es|access-date=May 4, 2010|date=April 4, 2010|website=Notimex|publisher=Diario Rotativo|archive-url=https://web.archive.org/web/20100430044947/http://rotativo.com.mx/nacionales/el_sismo_se_esperaba_hace_tiempo_experto/883%2C33%2C29404%2Chtml|archive-date=April 30, 2010|url-status=dead}} Before the {{M|w|link=y}} 7.2 earthquake occurred, the surrounding area had been seismically active in 2009. Several foreshocks began from April 1, 2010, with magnitudes of 3 and 4.{{cite news|url=http://www.mercurynews.com/breaking-news/ci_14821076|archive-url=https://wayback.archive-it.org/all/20100429173651/http://www.mercurynews.com/breaking-news/ci_14821076?nclick_check=1|url-status=dead|archive-date=April 29, 2010|title=Big Baja quake came from 'chaotic' fault system|author=Chang, Alicia|newspaper=The Mercury News|date=April 4, 2010|access-date=April 4, 2010}}

=Mainshock=

The earthquake measured 7.2 on the moment magnitude scale that started {{convert|25|km|sp=us}} south of Guadalupe Victoria, Baja California, at a depth of {{convert|10|km|abbr=on}}.{{cite news|url=https://news.yahoo.com/s/nm/20100404/us_nm/us_quake_mexico|title=Strong 6.9 quake jolts Baja California, Mexico|publisher=Yahoo|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100407225203/http://news.yahoo.com/s/nm/20100404/us_nm/us_quake_mexico|archive-date=April 7, 2010|url-status=dead}} It occurred at 22:40 UTC (1540 local time) on Easter Sunday, April 4, 2010, and it is said to have lasted about a minute and 29 seconds. Since the earthquake occurred on this day, it has been also called the Easter Sunday earthquake.{{cite news|url=http://www.ecoronado.com/profiles/blogs/easter-sunday-earthquake-in?xg_source=activity|title=Easter Sunday Earthquake in Baja California Felt Strongly in Coronado|last=Denny|first=Barbara|date=April 4, 2010|work=eCoronado.com|access-date=April 7, 2010|archive-url=https://web.archive.org/web/20100407034543/http://www.ecoronado.com/profiles/blogs/easter-sunday-earthquake-in?xg_source=activity|archive-date=April 7, 2010|url-status=dead}} Intensity VII (Very strong) shaking was felt in Calexico, Imperial, El Centro, and Heber. Intensity VI (Strong) shaking was felt in the Imperial Valley towns of Ocotillo, Calipatria, Brawley, and Holtville.{{cite web|title=M7.2 – Baja California, Mexico|url=https://earthquake.usgs.gov/earthquakes/eventpage/usp000habu#general_summary|publisher=United States Geological Survey}}

The April 4 quake was the second largest earthquake in Baja California history after the 1892 Laguna Salada earthquake at a magnitude of 7.2–7.8 on the Richter magnitude scale, and was well recorded in Southern California, especially in the Imperial valley.{{cite web|language=es|publisher=United States Geological Survey|title=Resumen Tectónico|url=https://earthquake.usgs.gov/earthquakes/eqinthenews/2010/ci14607652/summary_esp.php|access-date=April 7, 2010|date=April 5, 2010|archive-url=https://web.archive.org/web/20100409021009/http://earthquake.usgs.gov/earthquakes/eqinthenews/2010/ci14607652/summary_esp.php|archive-date=April 9, 2010|url-status=dead}}

=Aftershocks=

File:Laguna Salada fault - USGS map.gif (outlined in red).|alt=The fault is located in Southern California.]]

File:April 2010 Baja California aftershock intensity USGS.jpg

File:Usgs 201004041854.png

Four aftershocks with a magnitude of at least 5 have been reported; one at a magnitude of 5.2,{{cite web|url=https://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010urbv.php|title=Magnitude 5.2 – Baja California, Mexico|publisher=United States Geological Survey|access-date=May 4, 2010|archive-url=https://web.archive.org/web/20100409044652/http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010urbv.php|archive-date=April 9, 2010|url-status=dead}} one at 5.4,{{cite web|url=https://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010urbx.php|title=Magnitude 5.4 – BAJA CALIFORNIA, MEXICO|publisher=United States Geological Survey|access-date=May 4, 2010|archive-url=https://web.archive.org/web/20100409141657/http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010urbx.php|archive-date=April 9, 2010|url-status=dead}} one at 5.1,{{cite web|url=https://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010usad.php|title=Magnitude 5.1 – SONORA, MEXICO|publisher=United States Geological Survey|access-date=May 4, 2010|archive-url=https://web.archive.org/web/20100409044655/http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010usad.php|archive-date=April 9, 2010|url-status=dead}} and one at a magnitude of 5.7, all four within one hour. Additionally, a 5.3 aftershock hit the region very close to the mainshock epicenter on April 8, at approximately 9:44 AM local time.{{cite web|url=http://www.signonsandiego.com/news/2010/apr/08/more-mexican-earthquakes-shake-region/|title=More Mexican earthquakes shake San Diego region|access-date=April 8, 2010|date=April 8, 2010|website=The San Diego Union-Tribune|last=Kleske|first=Andrew|archive-url=https://web.archive.org/web/20100410030043/http://www.signonsandiego.com/news/2010/apr/08/more-mexican-earthquakes-shake-region/|archive-date=April 10, 2010|url-status=live}} There have been at least nine large aftershocks in total.

By six hours after the earthquake, more than 90 aftershocks or triggered earthquakes between magnitude 3.0 and 5.1 were recorded in northern Baja California and Southern California.{{cite news|url=http://www.digitaljournal.com/article/290040|title=90+ aftershocks in Mexico-California region after strong quake|work=Digital Journal|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100409000613/http://www.digitaljournal.com/article/290040|archive-date=April 9, 2010|url-status=live}} This included a magnitude 3 event {{convert|5|km|sp=us}} off the coast of Malibu, California.{{cite news|url=http://latimesblogs.latimes.com/lanow/2010/04/one-death-reported-in-baja-quake.html|title=One death reported in Baja quake|work=Los Angeles Times|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100408133554/http://latimesblogs.latimes.com/lanow/2010/04/one-death-reported-in-baja-quake.html|archive-date=April 8, 2010|url-status=live}} By the early hours of the following morning, scientists had measured 100 aftershocks.{{cite news|url=http://www.foxnews.com/us/2010/04/05/border-city-absorbs-damage-quake/|title=Police patrol quake-damaged Calif. border town|agency=Associated Press|date=April 5, 2010|access-date=April 5, 2010|publisher=Fox News|archive-url=https://web.archive.org/web/20100407122214/http://www.foxnews.com/us/2010/04/05/border-city-absorbs-damage-quake/|archive-date=April 7, 2010|url-status=dead}}

Pat Abbott, a professor emeritus of geology at San Diego State University, said, "Any quake of this size seems to pass some kind of threshold where it's large enough to disturb or trigger other faults. In cases like this, that often means increasing stress on other faults, which makes them more prone to movement. The energy seems to be moving northward toward the San Andreas Fault. I don't want to anthropomorphize, but it's like this quake was goading the San Andreas." It remains to be seen how the {{convert|1300|km|abbr=on}} San Andreas Fault was affected by these temblors. The southern section of the San Andreas Fault worries scientists, because it has not ruptured in more than 300 years. The region also includes other faults, including the Imperial Fault Zone.{{cite news|url=http://www.signonsandiego.com/news/2010/apr/05/temblor-could-disturb-faults-scientists-say/|title=Temblor could disturb faults, scientists say|author=Lafee, Scott|newspaper=The San Diego Union-Tribune|date=April 5, 2010|access-date=April 5, 2010|archive-url=https://web.archive.org/web/20100407075438/http://www.signonsandiego.com/news/2010/apr/05/temblor-could-disturb-faults-scientists-say/|archive-date=April 7, 2010|url-status=live}}

In the early morning hours of April 10, 2010, an aftershock measuring magnitude 4.4 was felt throughout most of Southern California and Baja California. It was said to have lasted about ten seconds. No injuries or damage were reported. Another aftershock measuring a similar magnitude struck Southern California on the morning of April 11.{{cite news|url=http://www.nbcsandiego.com/news/local-beat/Weekend-Aftershocks-Rattle-San-Diego--90570524.html|title=Weekend Aftershocks Rattle San Diego|last=Wayland|first=Michelle|date=April 11, 2010|publisher=NBC San Diego|access-date=April 11, 2010|archive-url=https://web.archive.org/web/20100413051749/http://www.nbcsandiego.com/news/local-beat/Weekend-Aftershocks-Rattle-San-Diego--90570524.html|archive-date=April 13, 2010|url-status=live}}

Seismologists in the California Institute of Technology of Pasadena announced a 10 percent chance of another earthquake on the same magnitude (7.3) or greater to strike within the first week, and 5 percent in the rest of the month of April 2010. It also falls on the state of California's Earthquake Preparedness month, as state and FEMA officials urge the state citizens to take preparations, and schools and businesses conduct earthquake drills across the state. The California Geological survey added 50 new faults to its map of faults several weeks after the earthquake.{{cite news|title=Map shows 50 new California faults|last1=Becerra|first1=Hector|last2=Smith|first2=Doug|date=April 28, 2010|work=Los Angeles Times|url=http://www.latimes.com/news/custom/topofthetimes/topstories/la-me-california-faults-20100428-story.html|pages=A1, A15|access-date=May 29, 2014|archive-url=https://web.archive.org/web/20140530010215/http://www.latimes.com/news/custom/topofthetimes/topstories/la-me-california-faults-20100428-story.html|archive-date=May 30, 2014|url-status=live}}

Geological field work as of April 5, 2010, by Dr. Thomas Rockwell, professor of geology at San Diego State University, indicates about one meter of right-lateral surface faulting and 0.3 to 0.5 meters of vertical road offset on a fault that is located east of Laguna Salada Fault. Whether or not this is the Cerro Prieto Fault is unclear as of April 5. This is a developing field situation, as geologists are working to locate and measure the lateral extent of the surface faulting.

A strong aftershock with a magnitude of 5.7 occurred on June 14, 2010, at 9:26:58 PM PDT, with an epicenter near Ocotillo in southwestern Imperial County and a focal depth of 5.0 km.{{cite web|last=Robbins|first=Gary|url=http://www.signonsandiego.com/news/2010/jun/14/grsq-earthquake-shakes-san-diego/|title=Late night quake jolts San Diego|work=The San Diego Union-Tribune|date=June 14, 2010|access-date=September 6, 2010}}{{cite web|url=http://neic.usgs.gov/neis/bulletin/neic_xnal.html|title=Preliminary Earthquake Report Magnitude 5.8 SOUTHERN CALIFORNIA|publisher=United States Geological Survey|date=June 14, 2010|access-date=June 26, 2010|archive-url=https://web.archive.org/web/20100629225132/http://neic.usgs.gov/neis/bulletin/neic_xnal.html|archive-date=June 29, 2010|url-status=dead}}

On July 7, 2010, a 5.4-magnitude earthquake, triggered by the April 10, 2010, quake, occurred on the San Jacinto Fault, the most seismically active fault in California, and one of two that exhibited signs of increased pressure following the Mexico quake. It was centered 15 miles (20 kilometers) northwest of the town of Borrego Springs. The main quake in April had transferred stress to fault zones farther north, triggering the aftershock. The quake rattled buildings in downtown Los Angeles, toppled bottles off shelves, and briefly halted rides at Disneyland.

Impact

=Mexico=

Baja California state capital Mexicali was reported by Comisión Federal de Electricidad (CFE) Director General Alfredo Elías Ayub as being without electricity.{{cite web|url=http://www.eluniversal.com.mx/notas/670530.html|title=Elevan a 7.2 grados Richter temblor en BC|website=Notimex|publisher=El Universal|date=April 4, 2010|language=es|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100408203014/http://www.eluniversal.com.mx/notas/670530.html|archive-date=April 8, 2010|url-status=live}} There were at least two fatalities in Mexicali, one of which was caused by a collapsed house.{{cite web|url=http://www.businessweek.com/news/2010-04-04/magnitude-7-2-quake-hits-baja-mexico-shakes-l-a-update3-.html|title=Magnitude 7.2 Quake Hits Baja, Mexico, Shakes L.A. (Update3)|work=Bloomberg Businessweek|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100407031910/http://www.businessweek.com/news/2010-04-04/magnitude-7-2-quake-hits-baja-mexico-shakes-l-a-update3-.html|archive-date=April 7, 2010|url-status=dead}} At least 100 people were injured in Mexicali and its suburbs.{{cite news|url=http://www.cnn.com/2010/WORLD/americas/04/04/mexico.earthquake/index.html?hpt=T1|title=Two killed, 100 injured in Mexican earthquake|publisher=CNN|date=April 5, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100407073051/http://www.cnn.com/2010/WORLD/americas/04/04/mexico.earthquake/index.html?hpt=T1|archive-date=April 7, 2010|url-status=live}} Multiple fires were caused by ruptured natural gas lines and damaged propane tanks,{{cite news|url=http://www.kpbs.org/news/2010/apr/05/72-earthquake-rocks-mexicali-san-diego-region/|title=7.2 Earthquake Rocks Mexicali, San Diego Region|author=Orr, Katie|publisher=KPBS|date=April 5, 2010|access-date=April 5, 2010|archive-url=https://web.archive.org/web/20100407231241/http://www.kpbs.org/news/2010/apr/05/72-earthquake-rocks-mexicali-san-diego-region/|archive-date=April 7, 2010|url-status=live}} and people were stuck in collapsed buildings as of the day after the quake. Major damage to irrigation systems occurred, severely impacting over 80,000 acres of agriculture in the Mexicali Valley. Groundwater flowed to the surface, flooding fields and damaging hundreds of miles of irrigation canals.{{cite web|last=Gracia|first=Alan Dennis|title=Irrigation Engineering in Seismic Zones – Mexicali Valley, Mexico|url=http://www.itrc.org/papers/2011/seismiczones.pdf|access-date=November 14, 2012|author2=Charles M. Burt and Mario Paredes Vallejoe|location=USCID Sixth International Conference on Irrigation and Drainage San Diego, CA|date=Nov 14–17, 2011}}{{dead link|date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 25,000 people overall were impacted by the earthquake.{{cite news|last=Isackson|first=Amy|title=Mexicali Earthquake Reshapes Lives And Landscape|url=http://www.kpbs.org/news/2010/apr/25/mexicali-earthquake-reshapes-lives-and-landscape/|access-date=November 14, 2012|publisher=KPBS|date=April 25, 2010}}

CNN reported that, "Pictures from Mexicali showed the sides ripped off buildings, toppled telephone poles, cracked roads, and supermarket aisles strewn with food that had fallen off shelves." Damage was also reported in a state government building in construction,{{cite web|url=http://www.eluniversal.com.mx/notas/670537.html|title=Reportan un muerto por sismo de 7.2 en BC|language=es|website=Notimex|publisher=El Universal|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100408203024/http://www.eluniversal.com.mx/notas/670537.html|archive-date=April 8, 2010|url-status=live}} and windows were broken at the Chamber of Commerce in the city.{{cite news|publisher=CNN|title=Earthquake shakes Pacific coast|date=April 4, 2010|access-date=April 4, 2010|url=http://news.blogs.cnn.com/2010/04/04/strong-earthquake-shakes-southern-california/?hpt=T1|archive-url=https://web.archive.org/web/20100409123405/http://news.blogs.cnn.com/2010/04/04/strong-earthquake-shakes-southern-california/?hpt=T1|archive-date=April 9, 2010|url-status=dead}} According to the San Diego Union Tribune, the largest hospital in Mexicali sustained damage and was moving patients to other facilities.

The quake was felt for about 40 seconds in Tijuana, Baja California, located {{convert|174|km|sp=us}} to the west-southwest, where it caused buildings to sway and knocked out power in parts of the city. Families celebrating Easter ran out of the homes.{{cite news|url=http://www.huffingtonpost.com/2010/04/04/mexico-earthquake-2010-69_n_524804.html|title=Mexico Earthquake 2010: 7.2 Quake Hits Baja California, Shakes Los Angeles|agency=Associated Press|work=HuffPost|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100407094530/http://www.huffingtonpost.com/2010/04/04/mexico-earthquake-2010-69_n_524804.html|archive-date=April 7, 2010|url-status=live}} A falling tree damaged a city water tank. Rescuers trying to reach Mexicali from Tijuana were slowed by a landslide along the highway.{{cite news|url=http://www.signonsandiego.com/news/2010/apr/04/69-magnitude-quake-shakes-san-diego-region/|title=Magnitude 7.2 quake blamed in Baja deaths|date=April 5, 2010|access-date=April 5, 2010|newspaper=The San Diego Union-Tribune|archive-url=https://web.archive.org/web/20100407055738/http://www.signonsandiego.com/news/2010/apr/04/69-magnitude-quake-shakes-san-diego-region/|archive-date=April 7, 2010|url-status=live}} The earthquake cracked the main aqueduct that carries Colorado River water from Mexicali to Tijuana, causing limitations on the water supply in Tijuana.

The day after the quake, Baja California Governor José Guadalupe Osuna asked the federal government for a state of emergency to be declared.{{cite web|url=http://www.eluniversal.com.mx/notas/670613.html|website=Notimex|publisher=El Universal|title=Gobernador pide declarar desastre en BC|access-date=April 5, 2010|date=April 5, 2010|language=es|archive-url=https://web.archive.org/web/20100408203111/http://www.eluniversal.com.mx/notas/670613.html|archive-date=April 8, 2010|url-status=live}} President Felipe Calderón visited the Mexicali area on Monday, April 5, to inspect the damage first-hand.{{cite web|url=http://www.latimes.com/news/local/la-me-mexicali-earthquake6-2010apr06,0,6996419.story|title=After quake, life calms down on both sides of U.S.-Mexico border|website=Los Angeles Times|author=Tony Perry, Tracy Wilkinson and Ching-Ching Ni|access-date=April 5, 2010|date=April 5, 2010|archive-url=https://web.archive.org/web/20100409054842/http://www.latimes.com/news/local/la-me-mexicali-earthquake6-2010apr06%2C0%2C6996419.story|archive-date=April 9, 2010|url-status=live}}

=United States=

File:Response imgs for quake.jpg

United States Geological Survey seismologist Dr. Lucy Jones said at least 20 million people in the United States and Mexico, including most of Southern California, felt the quake. Sporadic power outages were reported throughout southern California.{{cite web|url=http://www.kpbs.org/news/2010/apr/04/69-earthquake-shakes-south-san-diego-border|title=7.2 Earthquake Shakes San Diego Region|website=KPBS Media Group|access-date=April 4, 2010|date=April 4, 2010|archive-url=https://web.archive.org/web/20100407083854/http://www.kpbs.org/news/2010/apr/04/69-earthquake-shakes-south-san-diego-border|archive-date=April 7, 2010|url-status=live}} Skyscrapers shook in San Diego, California, {{convert|180|km|sp=us}} northwest of the epicenter.{{cite news|url=http://latimesblogs.latimes.com/lanow/2010/04/69-earthquake-strikes-baja-california-los-angeles-rattled.html|title=6.9 earthquake strikes Baja California; Los Angeles rattled|work=Los Angeles Times|access-date=April 4, 2010|date=April 4, 2010|last=Vives|first=Ruben, Shelby Grad|archive-url=https://web.archive.org/web/20100407183626/http://latimesblogs.latimes.com/lanow/2010/04/69-earthquake-strikes-baja-california-los-angeles-rattled.html|archive-date=April 7, 2010|url-status=live}} The earthquake broke at least two water mains, one at a Nordstrom department store in Fashion Valley Mall and another at Mission Bay High School. San Diego International Airport also had a water leak at Gate 33 in Terminal 2, and the terminal was evacuated for about 10 minutes due to fears of a natural gas leak.{{cite news|url=http://www.signonsandiego.com/news/2010/apr/04/69-magnitude-quake-shakes-san-diego-region/?success|newspaper=The San Diego Union-Tribune|title=7.2-magnitude quake shakes San Diego region|date=April 4, 2010|access-date=April 4, 2010}} The Coronado Bridge over San Diego Bay was briefly closed by the California Highway Patrol as a precautionary measure.{{cite news|url=https://www.foxnews.com/world/deadly-magnitude-7-2-quake-shakes-u-s-mexico|title=Magnitude 7.2 Earthquake Reported in Baja California|publisher=Fox News|date=April 4, 2010|access-date=April 4, 2010|archive-url=https://web.archive.org/web/20100407074934/http://www.foxnews.com/world/2010/04/04/magnitude-earthquake-reported-baja-california/|archive-date=April 7, 2010|url-status=live}} The Sheraton Hotel and Marina was evacuated when cracks were discovered in the floors and reoccupied once deemed to be safe.

Electric service was disrupted across most of the Imperial Valley. In Calexico, California, Fire Chief Peter Mercado said that there were structural damage, leaking gas lines, and damage to the town's water system, but that no one was hurt. Calexico Police Lieutenant Gonzalo Gerardo said, "Downtown is going to remain closed until further notice. I honestly doubt that it will reopen soon. You've got a lot of cracks. You've got a lot of broken glass. It's unsafe for people to go there." The Calexico border crossing on California State Route 7 and a section of Interstate 8 were both closed.{{cite news|url=http://www.ivblogz.com/quicknews/|title=ImperialValleyPressOnline|publisher=Imperial Valley Press|access-date=April 4, 2010|date=April 4, 2010|archive-url=https://web.archive.org/web/20100327001751/http://www.ivblogz.com/quicknews/|archive-date=March 27, 2010|url-status=dead}}

In El Centro, California, gas leaks, water main breaks, and collapsed chimneys and balconies were reported.{{cite web|url=http://www.latimes.com/news/local/la-fg-quake5-2010apr05,0,5085245.story?page=2|title=Quake rolls across Baja|website=Los Angeles Times|last=Perry|first=Toni, Tracy Wilkinson|access-date=May 4, 2010|date=May 4, 2010|archive-url=https://web.archive.org/web/20100510121517/http://www.latimes.com/news/local/la-fg-quake5-2010apr05%2C0%2C5085245.story?page=2|archive-date=May 10, 2010|url-status=live}} A man was injured when he fell during the quake, and another man was injured when a sign fell on him. One city hospital had so many people, that The Salvation Army sent a truck with water canteens and sandwiches.

It was felt in downtown Los Angeles, where there were no immediate reports of damage, although the Los Angeles Fire Department was put on alert. It was reported that some people were stuck in an elevator in Disneyland, Anaheim,{{cite news|url=https://www.nytimes.com/2010/04/05/us/05quake.html|access-date=April 4, 2010|date=April 4, 2010|work=The New York Times|title=Strong Mexico Quake Shakes Buildings and Nerves in California|last=Steinhauer|first=Jennifer|archive-url=https://web.archive.org/web/20100407181213/http://www.nytimes.com/2010/04/05/us/05quake.html|archive-date=April 7, 2010|url-status=live}} and in a Century City high-rise in Los Angeles.{{cite journal|url=http://www.csmonitor.com/USA/2010/0404/Mexicali-earthquake-What-are-the-damage-reports-in-LA|access-date=April 5, 2010|date=April 4, 2010|journal=The Christian Science Monitor|title=Mexicali earthquake: What are the damage reports in LA?|last=Wood|first=Daniel|archive-url=https://web.archive.org/web/20100407015010/http://www.csmonitor.com/USA/2010/0404/Mexicali-earthquake-What-are-the-damage-reports-in-LA|archive-date=April 7, 2010|url-status=live}} The rides in Disneyland were temporarily closed for inspection. In the Yuma, Arizona area, 3,369 residents experienced a "relatively momentary [power] outage" from the quake, "but most were back in service shortly afterward".{{cite news|url=http://www.myfoxphoenix.com/dpp/weather/apxArizonaBaja-Earthquake_07177034|access-date=April 4, 2010|date=April 4, 2010|publisher=My FOX Phoenix|title=Baja California Earthquake Felt in Arizona|agency=Associated Press|archive-url=https://web.archive.org/web/20100408230315/http://www.myfoxphoenix.com/dpp/weather/apxArizonaBaja-Earthquake_07177034|archive-date=April 8, 2010|url-status=live}}

References

{{Reflist|refs=

{{cite news|url=http://mexico.cnn.com/nacional/2010/04/06/cuatro-muertos-y-cien-heridos-por-sismo-en-baja-california|title=Cuatro muertos y cien heridos por sismo en Baja California|access-date=April 29, 2010|date=April 6, 2010|work=CNN En Español Mexico|publisher=CNN|language=es|archive-url=https://web.archive.org/web/20100410233546/http://mexico.cnn.com/nacional/2010/04/06/cuatro-muertos-y-cien-heridos-por-sismo-en-baja-california|archive-date=April 10, 2010|url-status=dead}}

{{cite journal|author=Gonzalez-Ortega, Alejandro|author2=Fialko, Yuri|author3=Sandwell, David|author4=Nava-Pichardo, F. Alejandro|author5=Fletcher, John|author6=Gonzalez-Garcia, Javier|author7=Lipovsky, Brad|author8=Floyd, Michael|author9=Funning, Gareth|title=El Mayor-Cucapah (Mw 7.2) earthquake: early near-field postseismic deformation from InSAR and GPS observations|journal=Journal of Geophysical Research|volume=119|issue=2|pages=1482|year=2014|doi=10.1002/2013JB010193|url=https://stanford.edu/~lipovsky/cucapah.pdf|bibcode=2014JGRB..119.1482G|s2cid=16572243|access-date=February 28, 2014|archive-url=https://web.archive.org/web/20140304050915/http://stanford.edu/~lipovsky/cucapah.pdf|archive-date=March 4, 2014|url-status=dead}}

{{citation|title=Significant Earthquake Database|url=https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1|author=National Geophysical Data Center / World Data Service (NGDC/WDS)|publisher=National Geophysical Data Center, NOAA|doi=10.7289/V5TD9V7K|year=1972|type=Data Set}}

{{citation|url=https://www.eeri.org/site/images/eeri_newsletter/2010_pdf/Baja_CA_EQRpt.pdf|title=The Mw 7.2 El Mayor Cucapah (Baja California) Earthquake of April 4, 2010|publisher=EERI Special Earthquake Report|access-date=October 23, 2021}}

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External links

[https://earthquake.usgs.gov/earthquakes/eventpage/usp000habu#general_summary M7.2 – Baja California, Mexico] – United States Geological Survey
[http://igppweb.ucsd.edu/~fialko/baja.html Rupture characteristics of M7.2 Sierra El Mayor (Mexico) earthquake] – PhD Y.Fialko
{{EQ-isc-link|600257057}}

Baja California

2010

Category:2010 in California

Category:2010 in Mexico

Category:2010 natural disasters in the United States

Earthquake

Category:Geology of Imperial County, California

Category:Natural history of Baja California

Category:Gulf of California

Earthquake

Category:Lower Colorado River Valley

Category:April 2010 in the United States