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On January 13, 2025, at 9:19pm JST, a 6.9 M JMA earthquake struck less than 10 km (6.2 mi) away from the August 8, 2024 earthquake at a depth of 30 km (19 mi), causing tremors recorded as a 5- on the JMA seismic intensity scale [15] and an observed 20cm tsunami in Miyazaki Prefecture.
Map of Tsunami Warnings issued by the Japan Meteorological Agency at 1 January 2024 16:22 JST. Large parts of Japan's western coast, from Hokkaido to Nagasaki Prefectures were immediately placed under a tsunami warning after the earthquake struck, with evacuation orders issued in Ishikawa, Niigata, Toyama, and Yamagata prefectures.
A seismogram recorded in Massachusetts, United States. The magnitude 9.1 (M w) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), [9] [56] with its epicenter approximately 72 km (45 mi) east of the Oshika Peninsula of Tōhoku, Japan, lasting approximately six minutes.
A 7.5 magnitude earthquake struck Japan on Monday afternoon, triggering a tsunami alert and prompting an official warning to residents to evacuate affected coastal areas as soon as possible.
TOKYO — Japan issued a tsunami advisory Thursday after a 7.1-magnitude earthquake struck off the southern island of Kyushu. The temblor occurred off the coast of Miyazaki Prefecture at 4:42 p.m ...
A strong 6.8 magnitude earthquake struck off the southwest coast of Japan on Monday. Tsunami warnings that had been issued have since been lifted for coastal areas near the quake’s epicenter.
In Japan, the Shindo scale is commonly used to measure earthquakes by seismic intensity instead of magnitude. This is similar to the Modified Mercalli intensity scale used in the United States, the Liedu scale used in China or the European Macroseismic Scale (EMS), meaning that the scale measures the intensity of an earthquake at a given location instead of measuring the energy an earthquake ...
In seismology, a tsunami earthquake is an earthquake which triggers a tsunami of significantly greater magnitude, as measured by shorter-period seismic waves. The term was introduced by Japanese seismologist Hiroo Kanamori in 1972. [ 1 ]