4.5

M4.5 Earthquake 41 km WNW of Hadjout, Algeria — August 8, 2020

2020-08-08 23:00:31 UTC (2020-08-08) · approx. 11:00 PM UTC+0 local

Felt by 15 people across nearby locations.

MagnitudeM4.5(mb)
Time23:00 UTC≈ 11:00 PM UTC+0
Depth10.0 kmshallow crustal
Coordinates36.667°, 1.986°
Felt by15DYFI responses
Status✓ Reviewed by USGS

On August 8, 2020 at 23:00 UTC, a magnitude 4.5 shallow crustal earthquake struck 41 km WNW of Hadjout, Algeria, at a depth of 10.0 km and coordinates 36.6666°, 1.9857°.

Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 36.67°, 1.99°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 15 citizen responses 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 M4.5 earthquake near 41 km WNW of Hadjout, Algeria

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

Earthquake Details

Magnitude
4.5 mb
Depth
10.0 km
shallow crustal
Location
36.6666°N
1.9857°E
Felt Reports
15
DYFI responses
Community Intensity
4.8
CDI from reports

Technical Information

Event ID
us6000bb8l
Event Type
earthquake
Status
✓ Reviewed
Significance
319
Azimuthal Gap
70.0°
Min Station Distance
2.557°
RMS Residual
0.57 sec
Last Updated
2020-10-21 22:03:59 UTC

Common Questions

How strong was the magnitude 4.5 earthquake near Hadjout, Algeria?

The magnitude 4.5 earthquake that struck 41 km WNW of Hadjout, Algeria on August 8, 2020 at 23:00 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 36.6666°, 1.9857°, which is 41 km WNW of Hadjout, Algeria.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.

Authoritative source: USGS event page (event ID: us6000bb8l). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2020, August 8, 2020). M4.5 Earthquake 41 km WNW of Hadjout, Algeria — August 8, 2020. Retrieved October 21, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000bb8l/