1858 Hietsu earthquake

{{Short description|Earthquakes in Japan}}

{{Infobox earthquake

| title = 1858 Hietsu earthquake

| pre-1900 = yes

| local-date = {{Start-date|April 9, 1858}}

| map2 = {{Location map | Japan Kanto Chubu Kansai

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| lat=36.4

| long=137.2

| mark=Bullseye1.png

| marksize=40

| position=top

| width= 250

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| magnitude = 7.1 {{M|?}}{{cite web|url=http://iisee.kenken.go.jp/utsu/utsuweq_bak_eng.html|title=Catalog of Damaging Earthquakes in the World (Through 2010)|last=Utsu|first=T.|year=2004|publisher=IISEE|accessdate=13 November 2011}}

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| location = {{coord|36.4|137.2|display=inline,title|type:event_region:JP_scale:1000000}}

| countries affected = Japan

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| casualties = 426

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File:1858_Hietsu_earthquake_intensity.png

The {{Nihongo|Hietsu earthquake|飛越地震|Hietsu jishin}} was a doublet earthquake that took place on April 9, 1858 (according to the old Japanese calendar, the 26th day of the second month of Ansei 5). It most likely occurred on the Atotsugawa and Miboro faults,{{cite web|url=https://confit.atlas.jp/guide/event-img/jpgu2015/00980/public/pdf?type=in|title=Epicenter of the Ansei Hietsu Earthquake in 1858 inferred from ratio of dead persons in each village|author=Komatsubara, Taku|publisher=Japan Geoscience Union|date=28 May 2015}} which connect the Amō Pass in Gifu Prefecture (in the part that was called Hida Province) and Mount Tate in Toyama Prefecture (then known as Etchū Province) on the island of Honshū in Japan. Its name includes one kanji from {{Nihongo|Hida|飛騨国}} and one from {{Nihongo|Etchū|越中国}}. The earthquakes are estimated to have killed 200–300 people. It also caused the Mount Tonbiyama landslide and blocked the upper reaches of the Jōganji River.{{cite journal | url=http://www.fujipress.jp/finder/xslt.php?mode=present&inputfile=DSSTR000500030003.xml | title=The Catastrophic Tombi Landslide and Accompanying Landslide Dams Induced by the 1858 Hietsu Earthquake | author=Inoue K., Mizuyama T. & Sakatani Y. | journal=Journal of Disaster Research | year=2010 | volume=5 | issue=3 | pages=245–256| doi=10.20965/jdr.2010.p0245 | doi-access=free }}