Early-est:     Mid - Indian Ridge    2026.10.12-11:28:45.73    q:B      mb:5.1    Mwp:-    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:./hypo.1791804525742.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791804525742.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791804525742.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791804525742.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: 5.1 [42]    Mwp: 5.5X [1]    Mwpd: 5.7Xinv [1]
Region: Mid - Indian Ridge
Origin Time: 2026.10.12-11:28:45.73 UTC
Hypocenter: lat: -8.78°  lon: 67.44°  [+/-18km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 73   usedPhases: 45
minDist: 5.2°   maxDist: 153.2°   AzGap: 47°   2ndAzGap: 57°   atten: -1.31 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 18km   azMaxHorUnc: 157°
68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 339°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 71°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [27]    Td: 1.7s [7]    Td*T50Ex: 0.7 [7]    To: 9.0s [22]
Closest plate boundaries:
   Australia - Somalia [oceanic transform fault]: distance: ~20km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 YES (20km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.7
   0.7
   0.7
Td*To:
     15.3
     15.3
     15.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791804525742.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 51°   dip: 36°   rake: 92°
Nodal Plane 2: strike: 229°   dip: 54°   rake: 88°
Quality: azimuthalGap: -1°   stationPolarityCount: 38   misfitWeightCount: 7.1   misfit: 0.19   stationDistributionRatio: 0.32   meanDistP: 38.0   meanDistT: 30.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791804525742.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 48°   dip: 32°   rake: 46°
Nodal Plane 2: strike: 277°   dip: 68°   rake: 113°
Quality: azimuthalGap: 89°   stationPolarityCount: 38   misfit: 0.22   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 25.53   fracAcc30degPref: 0.72   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791804525742.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.1791804525742.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.1791804525742.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791804525742
Event info last updated: 2026.10.12-12:29:01 UTC
Event first association/location: 2026.10.12-11:36:32 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI