4.1

M4.1 Earthquake 115 km WNW of Naha, Japan — May 28, 2020

2020-05-28 20:01:27 UTC (2020-05-28) · approx. 4:01 AM UTC+8 local

MagnitudeM4.1(mb)
Time20:01 UTC≈ 4:01 AM UTC+8
Depth89.9 kmintermediate depth
Coordinates26.637°, 126.628°
Felt byNo felt reports
Status✓ Reviewed by USGS

On May 28, 2020 at 20:01 UTC, a magnitude 4.1 intermediate depth earthquake struck 115 km WNW of Naha, Japan, at a depth of 89.9 km and coordinates 26.6373°, 126.6281°.

Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 26.64°, 126.63°

Earthquake Details

Magnitude
4.1 mb
Depth
89.9 km
intermediate depth
Location
26.6373°N
126.6281°E

Technical Information

Event ID
us6000a60e
Event Type
earthquake
Status
✓ Reviewed
Significance
259
Azimuthal Gap
70.0°
Min Station Distance
1.483°
RMS Residual
0.43 sec
Last Updated
2020-08-15 20:19:45 UTC

Common Questions

How strong was the magnitude 4.1 earthquake near Naha, Japan?

The magnitude 4.1 earthquake that struck 115 km WNW of Naha, Japan on May 28, 2020 at 20:01 UTC had a depth of 89.9 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 4.1 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.1 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000a60e). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2020, May 28, 2020). M4.1 Earthquake 115 km WNW of Naha, Japan — May 28, 2020. Retrieved August 15, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000a60e/