M5.9 earthquake 151 km SSE of Semnan, Iran
A magnitude 5.9 earthquake struck 151 km SSE of Semnan, Iran on Sat, Jul 23, 1927, 11:43 PM GMT+3:25:44 (20:18 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
- 5.9 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1927-07-23 20:18:03 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 34.433° N, 54.304° 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
- ±0.26
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.9 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 6.0145 km S of Semnan, Iran · 36232 days ago · 15 km deep · 63 km away
- 5.4157 km SE of Semnan, Iran · 36226 days ago · 15 km deep · 41 km away
Before
Earthquakes todayIran earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem909399. Read Sat, Oct 3, 2026, 2:32 PM UTC.