Moderate M 5.0 Earthquake Recorded South of Koshima, Japan
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A magnitude 5.0 earthquake occurred at a depth of 22.7 km south of Koshima, Japan, on February 12, 2026. No tsunami warnings have been issued.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 6, 2026 and geographically references Japan. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Japan.
What Happened
A moderate earthquake with a magnitude of 5.0 (mww) occurred on February 12, 2026, at 02:27:46 UTC. The seismic event was recorded by the USGS and is classified as a moderate earthquake, which typically indicates the potential for noticeable shaking.
Location Details
The epicenter was located approximately 114 km south of Koshima, Japan, at coordinates 29.2111°N and 130.6669°E. The earthquake originated at a depth of 22.742 km. This is considered an intermediate-depth earthquake, as it occurred between 20 and 70 km below the surface.
Impact Assessment
According to the USGS, there has been at least 1 felt report associated with this event, with a Community Decimal Intensity (CDI) of 2.2. There is currently no tsunami advisory, watch, or warning in effect (tsunami: 0). No specific alert level color was assigned to this event in the source data.
What You Should Know
Moderate earthquakes of this magnitude (M 5.0-5.9) are capable of causing damage to poorly constructed buildings, though well-built structures usually sustain little to no damage. Residents in the region should remain aware of the possibility of aftershocks, which are common following events of this size.
Source
Information provided by the USGS Earthquake Hazards Program.
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Frequently Asked Questions
Common questions about this USGS earthquake report.