4.1

M4.1 Earthquake near Molucca Sea — August 1, 2023

2023-08-01 20:14:51 UTC (2023-08-01) · approx. 4:14 AM UTC+8 local

MagnitudeM4.1(mb)
Time20:14 UTC≈ 4:14 AM UTC+8
Depth51.8 kmshallow crustal
Coordinates1.788°, 126.287°
Felt byNo felt reports
Status✓ Reviewed by USGS

On August 1, 2023 at 20:14 UTC, a magnitude 4.1 shallow crustal earthquake struck near Molucca Sea, at a depth of 51.8 km and coordinates 1.7884°, 126.2867°.

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 1.79°, 126.29°

Earthquake Details

Magnitude
4.1 mb
Depth
51.8 km
shallow crustal
Location
1.7884°N
126.2867°E

Technical Information

Event ID
us6000kzbq
Event Type
earthquake
Status
✓ Reviewed
Significance
259
Stations Used
12
Azimuthal Gap
141.0°
Min Station Distance
1.478°
RMS Residual
0.63 sec
Last Updated
2023-10-07 21:39:01 UTC

Common Questions

How strong was the magnitude 4.1 earthquake near Molucca Sea?

The magnitude 4.1 earthquake that struck near Molucca Sea on August 1, 2023 at 20:14 UTC had a depth of 51.8 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 4.1 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: us6000kzbq). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2023, August 1, 2023). M4.1 Earthquake near Molucca Sea — August 1, 2023. Retrieved October 7, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kzbq/