M5.7 earthquake 173 km SSE of Semnan, Iran
A magnitude 5.7 earthquake struck 173 km SSE of Semnan, Iran on Fri, Jul 22, 1927, 12:03 PM GMT+3:25:44 (08:37 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M6.0 145 km S of Semnan, Iran. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.7 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1927-07-22 08:37:41 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 34.208° N, 54.315° E
- Region
- Iran
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.20
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.7 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.7186 km N of Ardak?n, Iran · 36233 days ago · 15 km deep · 27 km away
- 5.9151 km SSE of Semnan, Iran · 36232 days ago · 15 km deep · 25 km away
- 6.0145 km S of Semnan, Iran · 36232 days ago · 15 km deep · 62 km away
- 5.4157 km SE of Semnan, Iran · 36226 days ago · 15 km deep · 58 km away
Before
Earthquakes todayIran earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem909395. Read Sat, Oct 3, 2026, 6:00 PM UTC.