TWO EARTHQUAKES CAUSE LOCAL TSUNAMIS IN SOLOMON ISLANDS, 12-13 APRIL 2014

The 12 April 2014 magnitude 7.6 (11.315°S, 162.211°E, depth=29 km, strike-slip faulting) and 13 April 2014 magnitude 7.4 (11.451°S, 162.069°E, depth=35 km, thrust faulting) about 100 km southeast of Kirakira, Solomon Islands generated small, non-destructive local tsunamis. This region is characterized transitional transform tectonics from thrust faulting along New Britain Trench to the northwest to thrust faulting along the New Hebrides Trench to the southeast. The events triggered regional tsunami warning alerts by the PTWC, which cancelled their alerts 1-2 hrs later when only 20-30 cm wave were observed at the Honiara sea level gauge.

Tsunamis recorded on nearby coastal sea level gauges in the Solomon Islands (Honiara, Lata Wharf), Vanuatu (Luganville, Port Vila), and New Caledonia (Hienghene, Lifou, Ouinne). Courtesy M. Yamamoto.
Solomon tsunami on 12April2014 Solomon tsunami on 13April2014

12apr14 regional PTWC RIFT M7.55 coastal amp1 2

PTWC RIFT coastal tsunami forecast available ~30 min after the earthquake.

 

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