2012 Kamaishi earthquake

The 2012 Kamaishi earthquake occurred near the city of Kamaishi, Japan, on December 7.[9] The magnitude 7.3 shock generated a small tsunami, with waves up to 1 m high, that hit Ishinomaki in Miyagi Prefecture.[10] It occurred at a depth of 36 km within the Pacific Plate and was the result of reverse faulting, about 20 kilometres (12 mi) east of the Japan Trench.

2012 Kamaishi earthquake
UTC time2012-12-07 08:18:23
ISC event607215270
USGS-ANSSComCat
Local dateDecember 7, 2012 (2012-12-07)
Local time17:18
Durationabout 1 minute[1]
Magnitude7.3
Depth36.1 km (22 mi)
Epicenter37.889°N 144.090°E / 37.889; 144.090
Areas affectedJapan
Max. intensityMMI V
Shindo 5-
Tsunami1.0 m in Ishinomaki, Miyagi
Landslidesno
Aftershocks8
Casualties3 dead, 14 injured [2][3][4][5][6][7][8]

Damage

Tsunami

The 1 metre (3.3 ft) tsunami caused a mountain of sandbags to collapse in Ishinomaki.[7] An old man went missing and was found dead on December 14 after he sailed out to sea to try to evacuate from the tsunami in Kuji.[6][7]

Shaking

Some pipeworks were damaged in an old people's facility in Saitama.[1] Some boards in a roof of an elementary school in Ichikai shifted.[11] An elderly lady died of shock at her home in Marumori, and a man died of shock after trying to evacuate from where he was working in Iitate, causing a total of 3 deaths.[6] This earthquake also caused 14 injuries.[7]

Previous earthquakes in Kamaishi

In 2001 and 2008, there were a series of micro earthquakes that could have started the tectonic plate movement that spawned the 2012 Kamaishi earthquake. These small series of earthquakes were a magnitude of about 3–4.9. It is studied that the shocks moved from the outer and deeper limits into the mainshock epicenter. These small earthquakes were a precursor that began the tectonic movement for the 2012 earthquake.[12]

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See also

References
  1. "三陸沖地震　埼玉県内も震度４　女性１人けが". 産経新聞. 8 December 2012. Archived from the original on 19 February 2013. Retrieved 9 December 2012.
  2. "Small tsunami waves hit Japan after 7.3-magnitude earthquake". NBC.
  3. "東北、関東で震度５弱＝宮城・石巻に津波１メートル－１１人けが、沿岸部は一時避難". 時事ドットコム. 2012-12-07. Retrieved 2012-12-08.
  4. "Archived copy". Archived from the original on 2012-12-13. Retrieved 2012-12-09.CS1 maint: archived copy as title (link)
  5. "Archived copy". Archived from the original on 2012-12-13. Retrieved 2012-12-09.CS1 maint: archived copy as title (link)
  6. "２万５０００人が一時避難　震度５弱　交通機関ほぼ平常に". 河北新報. 2012-12-08. Archived from the original on 2012-12-13. Retrieved 2012-12-09.
  7. "東北震度５弱:８県で１４人けが". 毎日新聞. 2012-12-08. Archived from the original on 2012-12-13. Retrieved 2012-12-09.
  8. "不明の船長、遺体で発見＝地震直後に沖合避難―岩手". 時事通信. 2012-12-14. Retrieved 2012-12-15.
  9. "Kamaishi Japan Rocked By 7.3 Magnitude Earthquake & Ofunato Japan Shaken by 6.2 Quake".
  10. "Japan earthquake sparks tsunami scare". BBC News. 2012-12-07.
  11. "三陸沖地震　宇都宮で男性軽傷、市貝町で小学校の天井がずれる". 産経新聞. 8 December 2012. Archived from the original on 18 February 2013. Retrieved 9 December 2012.
  12. Uchida, Naoki; Matsuzawa, Toru; Ellsworth, William L.; Imanishi, Kazutoshi; Shimamura, Kouhei; Hasegawa, Akira (2012-05-01). "Source parameters of microearthquakes on an interplate asperity off Kamaishi, NE Japan over two earthquake cycles". Geophysical Journal International. 189 (2): 999–1014. Bibcode:2012GeoJI.189..999U. doi:10.1111/j.1365-246X.2012.05377.x. ISSN 0956-540X.


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