M4.0 Earthquake 117 km NE of Esashi, Japan — July 20, 2026
2026-07-20 23:18:22 UTC (9 hours ago) · approx. 9:18 AM UTC+10 local
On July 20, 2026 at 23:18 UTC, a magnitude 4.0 deep-focus earthquake struck 117 km NE of Esashi, Japan, at a depth of 302.7 km and coordinates 45.5752°, 143.7832°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.7832°E
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Common Questions
How strong was the magnitude 4.0 earthquake near Esashi, Japan?
The magnitude 4.0 earthquake that struck 117 km NE of Esashi, Japan on July 20, 2026 at 23:18 UTC had a depth of 302.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000t22v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 20, 2026). M4.0 Earthquake 117 km NE of Esashi, Japan — July 20, 2026. Retrieved July 21, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t22v/