4.4

M4.4 Earthquake 75 km E of Katsuren-haebaru, JapanNovember 5, 2021

2021-11-05 20:56:41 UTC (2021-11-05) · approx. 5:56 AM UTC+9 local

MagnitudeM4.4(mb)
Time20:56 UTC5:56 AM UTC+9
Depth13.4 kmshallow crustal
Coordinates26.227°, 128.617°
Felt by1DYFI response
Status✓ Reviewed by USGS

On November 5, 2021 at 20:56 UTC, a magnitude 4.4 shallow crustal earthquake struck 75 km E of Katsuren-haebaru, Japan, at a depth of 13.4 km and coordinates 26.2265°, 128.6166°.

Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 26.23°, 128.62°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.

USGS DYFI community-reported intensity map for the M4.4 earthquake near 75 km E of Katsuren-haebaru, Japan

Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report

Earthquake Details

Magnitude
4.4 mb
Depth
13.4 km
shallow crustal
Location
26.2265°N
128.6166°E
Felt Reports
1
DYFI responses
Community Intensity
2.0
CDI from reports

Technical Information

Event ID
us7000frue
Event Type
earthquake
Status
✓ Reviewed
Significance
298
Azimuthal Gap
63.0°
Min Station Distance
0.680°
RMS Residual
0.95 sec
Last Updated
2022-01-15 20:51:35 UTC

Common Questions

How strong was the magnitude 4.4 earthquake near Katsuren-haebaru, Japan?

The magnitude 4.4 earthquake that struck 75 km E of Katsuren-haebaru, Japan on November 5, 2021 at 20:56 UTC had a depth of 13.4 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 4.4 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.4 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us7000frue). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2021, November 5, 2021). M4.4 Earthquake 75 km E of Katsuren-haebaru, JapanNovember 5, 2021. Retrieved January 15, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000frue/