M4.2 Earthquake 80 km ENE of Hachinohe, Japan — June 30, 2020
2020-06-30 22:32:04 UTC (2020-06-30) · approx. 7:32 AM UTC+9 local
On June 30, 2020 at 22:32 UTC, a magnitude 4.2 shallow crustal earthquake struck 80 km ENE of Hachinohe, Japan, at a depth of 59.7 km and coordinates 40.7270°, 142.3992°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
142.3992°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Hachinohe, Japan?
The magnitude 4.2 earthquake that struck 80 km ENE of Hachinohe, Japan on June 30, 2020 at 22:32 UTC had a depth of 59.7 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ajcs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, June 30, 2020). M4.2 Earthquake 80 km ENE of Hachinohe, Japan — June 30, 2020. Retrieved September 5, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000ajcs/