M7.2 earthquake in the South Pacific No impact of tsunami on Japan Possibility of tsunami near the epicenter –Weathernews

2022/03/31 14:54 Weathernews

At around 14:44 on Thursday, March 31, Japan time, there was a large-scale earthquake overseas. The epicenter is in the South Pacific (southeast of the Royality Islands), and the magnitude of the earthquake is estimated to be 7.2.

* The epicenter is from the Pacific Tsunami Warning Center (PTWC).

According to PTWC, there is a possibility of a tsunami.

(postscript)
The Japan Meteorological Agency also released information on teleseism at 15:11. There is no impact of the tsunami on Japan due to this earthquake.

There was a M7.0 earthquake near this epicenter at around 5:57 this morning, and sea level fluctuations of up to 7 cm were observed in New Caledonia.

Observing tsunami in Vanuatu etc.

Due to this earthquake, sea level fluctuations of up to 0.04 m were observed near the epicenter.

Observed tsunami height (announced by PTWC at 3:28)
0.78m Vanuatu Tanna Island
0.75m Great Barrier Island, New Zealand
0.48m Kingston, Norfolk Island
0.29m French New Caledonia Uwanne

Possibility of tsunami near the epicenter

Time to reach in the event of a tsunami From the US National Oceanic and Atmospheric Administration website

According to the Pacific Tsunami Warning Center (PTWC), there is a risk of a tsunami of 0.3m to 1m in the following countries and regions.

No worries regarding tsunami damage on the coast of Japan

According to the Japan Meteorological Agency, the coasts where some sea level fluctuations are expected in the country are as follows.

Is it a tremor of regarding “seismic intensity 3 in Japan” near the epicenter?

According to the United States Geological Survey National Earthquake Information Center (USGS, NEIC), there seems to have been a maximum of magnitude IV tremor in the revised Mercalli Intensity Class near the epicenter.

Although it is not possible to make a strict comparison, it seems to be a tremor equivalent to a seismic intensity of regarding 3 when converted to the Japan Meteorological Agency seismic intensity class.

No damage due to shaking

Since there is no land around the epicenter, it is considered that there is no damage due to shaking.

Reference materials, etc.