M 5.6 Earthquake Hits 113 km E of Miyako, 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 5.6 earthquake occurred 113 km east of Miyako, Japan, at a depth of approximately 24.5 km, with no tsunami advisory issued.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 20, 2026 and geographically references Eastern 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 magnitude 5.6 mb earthquake struck 113 km E of Miyako, Japan, at a depth of 24.452 km. The event occurred on June 28, 2026, at 03:46:06 UTC (converted from Unix timestamp 1776673966679).
Location Details
The earthquake was centered at coordinates 39.6393° N latitude and 143.2591° E longitude, approximately 113 km east of Miyako in Japan. With a depth of 24.452 km, this is considered an intermediate-depth earthquake (between 20-70 km), which can result in shaking over a wider area compared to shallow earthquakes.
Impact Assessment
There are no felt reports available for this earthquake. No tsunami advisory has been issued, as indicated by the tsunami value of 0, and the alert level is green.
What You Should Know
This moderate earthquake, with a magnitude of 5.6, may be followed by aftershocks as is common with such events. Safety tips include staying indoors and taking cover under sturdy furniture if shaking occurs, and being prepared for potential disruptions in the affected area.
Source
Information from the United States Geological Survey (USGS): [https://earthquake.usgs.gov/earthquakes/eventpage/us6000srih]
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,166 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to April 20, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.