Early-est:     Northeastern India    2026.10.05-22:53:48.73    q:B      mb:4.8    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791240826427.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791240826427.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791240826427.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791240826427.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: 4.8 [27]    Mwp: - [0]    Mwpd: - [0]
Region: Northeastern India
Origin Time: 2026.10.05-22:53:48.73 UTC
Hypocenter: lat: 26.33°  lon: 93.00°  [+/-13km]    depth: 51km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 59   usedPhases: 31
minDist: 1.3°   maxDist: 82.8°   AzGap: 163°   2ndAzGap: 181°   atten: -1.05 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 76°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 223°   majorAxisPlunge: 67°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 86°   intermediateAxisPlunge: 17°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [15]    Td: 0.2Xs [2]    Td*T50Ex: - [0]    To: 1.1s [10]
Closest plate boundaries:
   Eurasia - India [continental convergent boundary]: distance: ~90km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (90km)
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       51km
       51km
       51km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791240826427.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 127°   dip: 56°   rake: -159°
Nodal Plane 2: strike: 25°   dip: 73°   rake: -36°
Quality: azimuthalGap: -1°   stationPolarityCount: 32   misfitWeightCount: 7.7   misfit: 0.06   stationDistributionRatio: 0.66   meanDistP: 29.5   meanDistT: 26.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791240826427.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 124°   dip: 57°   rake: -159°
Nodal Plane 2: strike: 23°   dip: 73°   rake: -35°
Quality: azimuthalGap: 89°   stationPolarityCount: 32   misfit: 0.19   stationDistributionRatio: 0.61   rmsAngDiffAccPref: 33.46   fracAcc30degPref: 0.69   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791240826427.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.1791240826427.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.1791240826427.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791240826427
Event info last updated: 2026.10.05-23:54:02 UTC
Event first association/location: 2026.10.05-22:59:40 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI