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2012 Sanriku earthquake

Summary

The 2012 Sanriku earthquake (三陸沖地震, Sanriku oki jishin) occurred near the city of Kamaishi, Japan, on December 7 at 17:18 JST.[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 Sanriku earthquake
三陸沖地震
2012 Sanriku earthquake is located in Japan
2012 Sanriku 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 Mw
Depth36.1 km (22 mi)
Epicenter37°53′20″N 144°05′24″E / 37.889°N 144.090°E / 37.889; 144.090
Areas affectedJapan
Max. intensityMMI V (Moderate)

JMA 5−
Tsunami1.0 m (3.3 ft) in Ishinomaki, Miyagi
Casualties3 dead, 14 injured [2][3][4][5][6][7][8]

Damage edit

Tsunami edit

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 edit

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 edit

In 2001 and 2008, there were a series of micro earthquakes that could have started the tectonic plate movement that triggered the 2012 Kamaishi earthquake. These small series of earthquakes were a magnitude of about 3–4.9. According to studies, 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]

See also edit

References edit

  1. ^ a b "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. Archived from the original on 2013-11-12. Retrieved 2012-12-08.
  4. ^ "東北震度5弱:8県で14人けが－ 毎日jp(毎日新聞)". Archived from the original on 2012-12-13. Retrieved 2012-12-09.
  5. ^ "ͤ 񡡿 ٣ 塡 ̵ ؤۤ ʿ j ̿ - Yahoo! ˥塼". Archived from the original on 2012-12-13. Retrieved 2012-12-09.
  6. ^ a b c "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. ^ a b c d "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.[permanent dead link]
  9. ^ "Kamaishi Japan Rocked By 7.3 Magnitude Earthquake & Ofunato Japan Shaken by 6.2 Quake". 7 December 2012.
  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.

External links edit

  • The International Seismological Centre has a bibliography and/or authoritative data for this event.