M4.9 Earthquake 58 km NE of Nanao, Japan — June 20, 2022
2022-06-20 01:31:33 UTC (2022-06-20) · approx. 10:31 AM UTC+9 local
Felt by 8 people across nearby locations.
On June 20, 2022 at 01:31 UTC, a magnitude 4.9 shallow crustal earthquake struck 58 km NE of Nanao, Japan, at a depth of 5.7 km and coordinates 37.4849°, 137.3302°. This earthquake was detected by 130 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 374, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Japan, a region characterized by the intersection of four tectonic plates — Pacific, Philippine Sea, Eurasian, and North American — creating multiple subduction zones. The nearest mapped fault system is the Japan Trench. View all earthquakes in Japan.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 8 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
137.3302°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Nanao, Japan?
The magnitude 4.9 earthquake that struck 58 km NE of Nanao, Japan on June 20, 2022 at 01:31 UTC had a depth of 5.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 37.4849°, 137.3302°, which is 58 km NE of Nanao, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Has Japan had earthquakes this big before?
The largest recorded earthquake in Japan was the M9.1 Tohoku earthquake of March 11, 2011. Today's magnitude 4.9 event is significantly smaller than that historical record.
Actions
Location
Authoritative source: USGS event page (event ID: us7000himd). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, June 20, 2022). M4.9 Earthquake 58 km NE of Nanao, Japan — June 20, 2022. Retrieved August 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000himd/