- Source: 1968 Tokachi earthquake
The 1968 Tokachi earthquake (1968年十勝沖地震 Sen-kyūhyaku-rokujūhachi-nen Tokachi-oki Jishin) occurred on May 16 at 0:49 UTC (09:49 local time) in the area offshore of Aomori and Hokkaido. The magnitude of this earthquake was put at Mw 8.3. The intensity of the earthquake reached shindo 5 in Aomori, Aomori and Hakodate, Hokkaido.
Geology
This earthquake was located near the junction of the Kuril Trench and the Japan Trench. It was an interplate earthquake. The focal mechanism of this earthquake showed movement on a thrust fault with a considerable slip-strike component. The sum of interplate seismic moment release by seismic and aseismic faulting in this earthquake was about 28×1020 N m. The 1960s was noted as one of the peak periods of interplate seismic moment release in the offshore Sanriku region.
Damage
Heavy rain occurred due to a low pressure system in the days leading up to the earthquake and aggravated the damage. In Hokkaido, building damage was reported. A four-story RC building of Hakodate University collapsed. In Aomori Prefecture, there was damage to railroads and highways in more than 200 places caused by collapses of artificial embankments. In Hachinohe, there was damage to buildings, water pipes, and gas pipes. The three-story building of Hachinohe Technical College suffered severe damage. The communication between Honshu and Hokkaido was cut off.
Tsunami
A tsunami was triggered by the earthquake, with a maximum height of about 6 m (20 ft). An 11-centimeter (4.3 in) high tsunami was recorded in Tahiti. In Japan, the tsunami caused flooding and damage to aquaculture.
See also
List of earthquakes in 1968
List of earthquakes in Japan
References
Further reading
Izutani, Y. (2012), "Fault extent of the largest aftershock of the 1968 Tokachi-Oki, Japan, earthquake and an interpretation of the normal faulting focal mechanism" (PDF), Earth, Planets and Space, 63 (12): 1213–1216, doi:10.5047/eps.2011.07.018
External links
The International Seismological Centre has a bibliography and/or authoritative data for this event.
Kata Kunci Pencarian:
- 1968 Tokachi earthquake
- 2003 Tokachi earthquake
- List of earthquakes in Japan
- List of megathrust earthquakes
- Lists of earthquakes
- List of tsunamis
- Lists of 20th-century earthquakes
- 1968 in Japan
- 1994 offshore Sanriku earthquake
- List of earthquakes in 1968
