THE 25 MARCH 2020 TSUNAMI AT THE KURIL ISLANDS: ANALYSIS AND NUMERICAL SIMULATION

Abstract

A strong earthquake with a magnitude of 7.5 occurred near the island of Paramushir (Kuril Islands) on 25 March 2020. It caused a weak tsunami in Kamchatka and the Kuril Islands. Earthquake and tsunami data from three DART buoys are discussed and compared with numerical simulations. It is shown that the calculated and measured tsunami characteristics on the DART buoys is in very good agreement. There are also data on the recording of this earthquake by a laser strain-meter installed in the Sea of Japan at Shults cape at a distance of more than 2,000 km from the epicenter of the earthquake. There is also an instrumental recording of the tsunami at the Vodopadnaya point in the southeast of Kamchatka. Unfortunately, there was a large storm at sea at this time, and the amplitudes of tsunami waves and storm waves were comparable to each other, so here the agreement between calculations and observations does not seem good enough.

Keywords

• tsunami
• numerical simulation
• laser strain-meter
• shallow-water equations
• tsunami observations