4.0

M4.0 Earthquake 10 km SW of Blagoevgrad, BulgariaApril 25, 2022

2022-04-25 16:31:47 UTC (2022-04-25) · approx. 6:31 PM UTC+2 local

MagnitudeM4.0(mb)
Time16:31 UTC6:31 PM UTC+2
Depth8.2 kmshallow crustal
Coordinates41.948°, 23.019°
Felt byNo felt reports
Status✓ Reviewed by USGS

On April 25, 2022 at 16:31 UTC, a magnitude 4.0 shallow crustal earthquake struck 10 km SW of Blagoevgrad, Bulgaria, at a depth of 8.2 km and coordinates 41.9478°, 23.0187°.

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 41.95°, 23.02°

Earthquake Details

Magnitude
4.0 mb
Depth
8.2 km
shallow crustal
Location
41.9478°N
23.0187°E

Technical Information

Event ID
us6000hg93
Event Type
earthquake
Status
✓ Reviewed
Significance
246
Stations Used
22
Azimuthal Gap
52.0°
Min Station Distance
2.052°
RMS Residual
0.56 sec
Last Updated
2022-07-05 03:40:41 UTC

Common Questions

How strong was the magnitude 4.0 earthquake near Blagoevgrad, Bulgaria?

The magnitude 4.0 earthquake that struck 10 km SW of Blagoevgrad, Bulgaria on April 25, 2022 at 16:31 UTC had a depth of 8.2 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: us6000hg93). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2022, April 25, 2022). M4.0 Earthquake 10 km SW of Blagoevgrad, BulgariaApril 25, 2022. Retrieved July 5, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000hg93/