1984 San Pedro Basin earthquake

{{Short description|Earthquake off the coast of the Dominican Republic}}

{{Infobox earthquake

|title = 1984 San Pedro Basin earthquake

|timestamp = 1984-06-24 11:17:14

|isc-event = 551495

|anss-url = iscgem551495

|local-date = {{Start date|1984|06|24|df=y}}

|local-time = 07:17:14

|map2 = {{Location map+ | Dominican Republic

| relief = yes

|places =

{{Location map~|Dominican Republic|lat=18.47|long=-69.95|label=Santo Domingo|position=left|label_size=120|mark=Green pog.svg}}

{{Location map~|Dominican Republic|lat=18.43|long=-68.98|label=La Romana|position=top|label_size=120|mark=Green pog.svg}}

{{Location map~|Dominican Republic|lat=17.97|long=-69.3|mark=Bullseye1.png|marksize=40}}

| position = top

| width = 250

| float = right

| caption = }}

|magnitude = 6.7 {{M|w|link=y}}

|depth = 35 km

|location = {{coord|17.97|N|69.3|W|display=inline,title}}

|type = Thrust

|intensity = {{MMI|VII}}

|countries affected = Dominican Republic

|damage = Limited

|casualties = 5 deaths

}}

The 1984 San Pedro Basin earthquake occurred on June 24 at {{tooltip|07:17:14 local time|11:17:14 UTC}} with a moment magnitude of 6.7 and a maximum Mercalli intensity of VII (Very strong). The event occurred off the southern coast of the Dominican Republic and resulted in an estimated five fatalities.

Tectonic setting

The northern boundary of the Caribbean plate is a diffuse zone of varied fault types. The Muertos Trough marks the southern portion of this zone of deformation with north dipping convergence.{{citation|title=Active Faults of the World|url=https://books.google.com/books?id=aQUgAwAAQBAJ|last=Yeats|first=R.|date=2012|publisher=Cambridge University Press|isbn=978-0521190855|page=147}}

Earthquake

This thrust earthquake occurred on a shallow and north-dipping fault and, at the time, it was the largest instrumentally recorded event in the Los Muertos Trough.{{citation|title=Active Strike-slip and Collisional Tectonics of the Northern Caribbean Plate Boundary Zone|chapter=Active tectonics of the north-central Caribbean: Oblique collision, strain partitioning, and opposing subducted slabs|chapter-url=https://books.google.com/books?id=aO1P67XkwYwC|first=J. F.|last=Dolan|first2=H. T.|last2=Mullins|first3=D. J.|last3=Wald|year=1998|series=Special Paper 326|publisher=Geological Society of America|page=42|isbn=978-0813723266}}

Intensity

The United States Geological Survey estimated that more than 227,000 people were exposed to intensity VII (Very strong) shaking and more than 2.8 million experienced intensity VI (Strong) shaking.{{citation|title=EXPO-CAT Earthquake Catalog|url=https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/|date=December 1, 2008|publisher=United States Geological Survey|series=Version 2007-12}}

Aftershock

Five hours after the mainshock, a destructive 5.2 {{M|w}} aftershock occurred about 5–10 miles to the northeast. Five deaths are also attributed to this event.{{citation|title=PAGER-CAT Earthquake Catalog|url=https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/|date=September 4, 2009|publisher=United States Geological Survey|series=Version 2008_06.1}}

References

{{Reflist|refs=

{{citation|title=ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009)|url=http://www.isc.ac.uk/iscgem/index.php|author=ISC|year=2015|publisher=International Seismological Centre|series=Version 2.0}}

{{citation|title=Significant Earthquake Database|url=https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1|archive-url=https://web.archive.org/web/20060929000601/http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1|url-status=dead|archive-date=September 29, 2006|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}}

}}

External links

{{EQ-isc-link|551495}}

Category:Earthquakes in the Caribbean

Category:Natural disasters in the Dominican Republic

Category:1984 earthquakes