M 5.4 Earthquake Recorded 91 km SSE of Koshima, Japan
A moderate 5.4 magnitude earthquake occurred 91 km SSE of Koshima, Japan, on March 16, 2026, at a depth of 25.5 km. No tsunami advisory has been issued.
What Happened
A moderate earthquake with a magnitude of 5.4 mww was recorded on March 16, 2026, at 11:12:04 UTC. The event was located approximately 91 km south-southeast of Koshima, Japan.
Location Details
The seismic activity originated at coordinates 29.4276°N and 130.7265°E. The earthquake occurred at a depth of 25.517 km. Seismologists categorize this as an intermediate-depth earthquake, as it occurred within the 20-70 km range below the surface.
Impact Assessment
The United States Geological Survey (USGS) reported a maximum instrumental Modified Mercalli Intensity (MMI) of 3.64. There is currently no tsunami advisory, watch, or warning in effect following this event (tsunami: 0). No specific alert level color has been assigned, and there are no official reports of the earthquake being felt by the public in the current data set.
What You Should Know
Earthquakes with magnitudes between 5.0 and 5.9 are classified as “moderate.” While these events are frequently felt, they typically only cause damage to poorly constructed buildings and light to no damage to well-built structures. Residents in the region should remain aware of the possibility of aftershocks, which are common following a moderate seismic event.
Source
Data provided by the USGS Earthquake Hazards Program.
Source: USGS Official Notice