4.0

M4.0 Earthquake 97 km ENE of Amahai, Indonesia — July 24, 2020

2020-07-24 20:23:00 UTC (2020-07-24) · approx. 5:23 AM UTC+9 local

MagnitudeM4.0(mb)
Time20:23 UTC≈ 5:23 AM UTC+9
Depth18.8 kmshallow crustal
Coordinates-3.078°, 129.762°
Felt byNo felt reports
Status✓ Reviewed by USGS

On July 24, 2020 at 20:23 UTC, a magnitude 4.0 shallow crustal earthquake struck 97 km ENE of Amahai, Indonesia, at a depth of 18.8 km and coordinates -3.0783°, 129.7620°.

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.

Map showing earthquake epicenter at -3.08°, 129.76°

Earthquake Details

Magnitude
4.0 mb
Depth
18.8 km
shallow crustal
Location
-3.0783°N
129.7620°E

Technical Information

Event ID
us6000b67a
Event Type
earthquake
Status
✓ Reviewed
Significance
246
Azimuthal Gap
63.0°
Min Station Distance
2.488°
RMS Residual
0.56 sec
Last Updated
2020-10-03 17:32:32 UTC

Common Questions

How strong was the magnitude 4.0 earthquake near Amahai, Indonesia?

The magnitude 4.0 earthquake that struck 97 km ENE of Amahai, Indonesia on July 24, 2020 at 20:23 UTC had a depth of 18.8 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.

Understanding This Data

Magnitude 4.0 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000b67a). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2020, July 24, 2020). M4.0 Earthquake 97 km ENE of Amahai, Indonesia — July 24, 2020. Retrieved October 3, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000b67a/