Map Region : lat:-  lon:-

  North  
West   East
  South  
Show Cities
Show Foreign Cities
Show Fault Mechanism
Show Province Boundaries
Show Stations
Map Title

Magnitude
 :3.1
Date & Time (UTC) 2025-10-20 10:24:16.5
Date & Time (Local) 1404/7/28  13:54:16.5
Location Lat:36.651 Lon: 54.905
Region Semnan Province, 28 km South of Ali Abad
Nearest Cities
18 km North West of Qaleh-ye nokharqan, Semnan Province
21 km North West of Bastam, Semnan Province
26 km North of Shahrud, Semnan Province
28 km South of Ali Abad, Golestan Province
30 km North East of Majen, Semnan Province
Depth 12 km
Agency
Faults within 150 km:
SHAVAR_F (Length: 87 km) , Distance to epicenter: 9 km 
ASTANEH_F (Length: 72 km) , Distance to epicenter: 33 km 
KHAZAR_F (Length: 523 km) , Distance to epicenter: 40 km 
Number of Phases 15
RMS 0.3
Number of Stations 15
Error in Latitude >0.6 km
Error in Longitude 0.6 km
Error in Depth 2 km

Download waveform in seisan format

to download seisan software Click here

to access information about IIEES stations Click here

Amplitude

UIDAgencyStationComponentAmplitudePeriodArrival TimeProccessing TimeSignal Clip
199762IIEES SCMRVTZ 0.412025-10-20 10:24:412025-10-21 07:35:00n
199763IIEES SCBJRDZ 0.112025-10-20 10:24:562025-10-21 07:35:00n
199764IIEES SCCHTHZ 0.0812025-10-20 10:25:082025-10-21 07:35:00n
199765IIEES SCTABSZ 0.0412025-10-20 10:25:122025-10-21 07:35:00n
199766IIEES SCASAOZ 0.0412025-10-20 10:25:272025-10-21 07:35:00n
199767IIEES SCSHRTZ 0.0212025-10-20 10:25:382025-10-21 07:35:00n
199768IIEES SCBSRNZ 0.0212025-10-20 10:25:452025-10-21 07:35:00n

Phase

AgencyStationComponentPhase TypePhase QualityFirst MotionObserved Arrival TimeTime ResidualLoc. FlagInput WeightDistanceAzimuth
IIEES SCABGHZ EPg E2025-10-20 10:24:18-1.7n413314
IIEES SCGLOZ EPg E2025-10-20 10:24:33-0.1y098260
IIEES SCSHROZ EPg E2025-10-20 10:24:34-2.8n4122126
IIEES SCMRVTZ EPg E2025-10-20 10:24:41-0.2y015443
IIEES SCANJZ EPg E2025-10-20 10:24:42-0.2y0159214
IIEES SCBJRDZ EPn E2025-10-20 10:24:560.4y025162
IIEES SCDAMVZ EPn E2025-10-20 10:24:55-5n4287247
IIEES SCCHTHZ EPn E2025-10-20 10:25:080.4y0349256
IIEES SCTABSZ EPn E2025-10-20 10:25:12-0.1y0389149
IIEES SCGHVRZ EPn E2025-10-20 10:25:216.5n4410234
IIEES SCKAGHZ EPn E2025-10-20 10:25:200.2y045286
IIEES SCNASNZ EPn E2025-10-20 10:25:3411.5n4468204
IIEES SCASAOZ EPn E2025-10-20 10:25:270.7y0500242
IIEES SCSHRTZ EPn E2025-10-20 10:25:380.3y0593124
IIEES SCBSRNZ EPn E2025-10-20 10:25:450.3y0649143