Early-est:     Nicobar Islands, India Region    2025.11.10-20:16:48.48    q:B      mb:4.6    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 4.6 [9]    Mwp: - [0]    Mwpd: - [0] Region: Nicobar Islands, India Region Origin Time: 2025.11.10-20:16:48.48 UTC Hypocenter: lat: 8.29°  lon: 91.98°  [+/-15km]    depth: 10km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 17   usedPhases: 12 minDist: 3.4°   maxDist: 148.5°   AzGap: 86°   2ndAzGap: 137°   atten: -0.70 [+/-0.70] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 34° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 216°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 308°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [9]    Td: -s [0]    Td*T50Ex: - [0]    To: 12.0s [5] Closest plate boundaries:    India \ Burma [subduction zone]: distance: ~30km    Burma / India [subduction zone]: distance: ~150km Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 7km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (30km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        7km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 46°   dip: 9°   rake: 15° Nodal Plane 2: strike: 301°   dip: 88°   rake: 99° Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 4.2   misfit: 0.04   stationDistributionRatio: 0.61   meanDistP: 30.0   meanDistT: 44.5   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 115°   dip: 84°   rake: -115° Nodal Plane 2: strike: 13°   dip: 26°   rake: -14° Quality: azimuthalGap: 137°   stationPolarityCount: 10   misfit: 0.26   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 47.81   fracAcc30degPref: 0.27   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° 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
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° 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

Event ID: smi:KOERI/ee/event/1762805808640
Event info last updated: 2025.11.10-21:16:08 UTC
Event first association/location: 2025.11.10-20:26:56 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI