1933 Sanriku earthquake


























































1933 Sanriku earthquake

Kamaishi Bay after 1933 tsunami.jpg
Kamaishi Bay, Iwate after the event


1933 Sanriku earthquake is located in Japan
1933 Sanriku earthquake


Tarō

Tarō



UTC time		 1933-03-02 17:30:59

ISC event		 905420
USGS-ANSS
 ComCat
Local date March 3, 1933 (1933-03-03)
Local time 02:30:48 JST
Magnitude 8.4 Mw[1]
Depth 20 km (12 mi)
Epicenter
39°7.7′N 144°7′E / 39.1283°N 144.117°E / 39.1283; 144.117Coordinates: 39°7.7′N 144°7′E / 39.1283°N 144.117°E / 39.1283; 144.117
Type
Dip-slip – Intraplate
Areas affected Japan
Tsunami Up to 28.7 m (94 ft)
in Ryori, Kesen, Iwate, Tōhoku
Casualties 1,522 deaths,
1,542 missing,
12,053 people injured



Damage at Kamaishi


The 1933 Sanriku earthquake (昭和三陸地震, Shōwa Sanriku Jishin) occurred on the Sanriku coast of the Tōhoku region of Honshū, Japan on March 2 with a moment magnitude of 8.4. The associated tsunami caused widespread damage.




Contents






  • 1 Earthquake


  • 2 Damage


  • 3 See also


  • 4 Notes


  • 5 External links





Earthquake


The epicenter was located offshore, 290 kilometres (180 mi) east of the city of Kamaishi, Iwate. The main shock occurred at 02:31 AM local time on March 3, 1933 (17:31 UTC March 2, 1933) and measured 8.4 on the moment magnitude scale.[2] It was in approximately the same location as the 1896 Sanriku earthquake and it occurred far enough away from the town that shaking did little damage. Approximately three hours after the main shock was a magnitude 6.8 aftershock, followed by 76 more aftershocks (with a magnitude of 5.0 or greater) over a period of six months.[3] This was an intraplate event that occurred within the Pacific Plate,[4] and the focal mechanism showed normal faulting.[5]



Damage


Although little damage was produced from the shock, the tsunami, which was recorded to reach the height of 28.7 metres (94 ft) at Ōfunato, Iwate, caused extensive damage, and destroyed many homes and caused numerous casualties.[6] The tsunami destroyed over 7,000 homes along the northern Japanese coastline, of which over 4,885 were washed away. The tsunami was also recorded in Hawaii with a height of 9.5 feet (2.9 m), and also resulted in slight damage.[2] The death toll came to 1,522 people confirmed dead, 1,542 missing, and 12,053 injured. Hardest hit was the town of Tarō, Iwate (now part of Miyako city), with 98% of its houses destroyed and 42% of its population killed.[7]



See also



  • List of earthquakes in 1933

  • List of earthquakes in Japan

  • Seismicity of the Sanriku coast



Notes





  1. ^ Kanamori, H. (1977), "The energy release in great earthquakes" (PDF), Journal of Geophysical Research, American Geophysical Union, 82 (20): 2981–2987, Bibcode:1977JGR....82.2981K, doi:10.1029/JB082i020p02981.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ ab "Historical Earthquakes:The 1933 Sanriku earthquake". United States Geological Survey. 14 March 2008. Archived from the original on 24 July 2008. Retrieved 2008-07-16.


  3. ^ The Meiji Sanriku Earthquake (June 15, 1896, M 8 1/2) and Sanriku Earthquake (March 3, 1933, M 8.1)


  4. ^ "日本海溝・千島海溝周辺海溝型地震に関する専門調査会報告" by 日本海溝・千島海溝周辺海溝型地震に関する専門調査会


  5. ^ Lay, T.; Ammon, C. J.; Kanamori, H.; Kim, M. J.; Xue, L. (2011), "Outer trench-slope faulting and the 2011 M w 9.0 off the Pacific coast of Tohoku Earthquake", Earth, Planets and Space, Springer Science+Business Media, 63 (7): 713, Bibcode:2011EP&S...63..713L, doi:10.5047/eps.2011.05.006


  6. ^ Masayuki Nakao, "The Great Meiji Sanriku Tsunami". Association For The Study Of Failure


  7. ^ Corkill, Edan, "Heights of survival", Japan Times, 12 June 2011, pp. 9–10.




External links



  • Historic video footage of devastation following 1933 Sanriku Earthquake

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










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