Early-est:     Southwestern Siberia, Russia    2026.10.10-00:47:08.56    q:B      mb:4.7    Mwp:-    Mwpd:-    Td*T50Ex:0.5     fmamp_polarity:./hypo.1791593231254.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791593231254.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791593231254.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791593231254.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.7 [22]    Mwp: - [0]    Mwpd: - [0]
Region: Southwestern Siberia, Russia
Origin Time: 2026.10.10-00:47:08.56 UTC
Hypocenter: lat: 53.98°  lon: 86.23°  [+/-17km]    depth: 18km  [+/-24km]
Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 40   usedPhases: 27
minDist: 4.5°   maxDist: 54.1°   AzGap: 163°   2ndAzGap: 260°   atten: -1.54 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 17km   azMaxHorUnc: 63°
68%ConfEllipsoid:   semiMajorAxisLength: 27km   majorAxisAzimuth: 235°   majorAxisPlunge: 52°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 116°   intermediateAxisPlunge: 20°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.5 [11]    Td: 1.1s [4]    Td*T50Ex: 0.5 [4]    To: 3.6s [4]
Closest plate boundaries:
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   0.5
   0.5
   0.5
Td*To:
     4.0
     4.0
     4.0
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       18km
       18km
       18km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791593231254.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 55°   dip: 11°   rake: -163°
Nodal Plane 2: strike: 308°   dip: 87°   rake: -79°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 4.8   misfit: 0.09   stationDistributionRatio: 0.47   meanDistP: 34.8   meanDistT: 31.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791593231254.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 163°   stationPolarityCount: 25   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791593231254.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
./hypo.1791593231254.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp
./hypo.1791593231254.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791593231254
Event info last updated: 2026.10.10-01:48:02 UTC
Event first association/location: 2026.10.10-00:55:21 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI