Early-est:     Nicobar Islands, India Region    2026.08.09-03:02:13.89    q:C      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

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

Earthquake Details: Magnitude: mb: 4.8* [18]    Mwp: - [0]    Mwpd: - [0] Region: Nicobar Islands, India Region Origin Time: 2026.08.09-03:02:13.89 UTC Hypocenter: lat: 7.19°  lon: 94.49°  [+/-38km]    depth: 52km  [+/-32km] Location Quality: qualityCode:  C     stdErr: 0.7s   assocPhases: 43   usedPhases: 21 minDist: 3.1°   maxDist: 84.9°   AzGap: 126°   2ndAzGap: 136°   atten: -1.34 [+/-0.61] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 38km   azMaxHorUnc: 58° 68%ConfEllipsoid:   semiMajorAxisLength: 50km   majorAxisAzimuth: 59°   majorAxisPlunge: 25°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 208°   intermediateAxisPlunge: 61°   semiMinorAxisLength: 22km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [12]    Td: -s [0]    Td*T50Ex: - [0]    To: 10.3s [11] Closest plate boundaries:    Sunda - Burma [continental transform fault]: distance: ~40km    Burma / India [subduction zone]: distance: ~250km    India \ Burma [subduction zone]: distance: ~250km Subduction geometry:    Zone: Sumatra-Java: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9 Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (250km)  no  YES (40km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        52km        52km        52km Slab depth at epicenter:        n/a        -        - Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 33°   dip: 51°   rake: -21° Nodal Plane 2: strike: 136°   dip: 74°   rake: -140° Quality: azimuthalGap: -1°   stationPolarityCount: 21   misfitWeightCount: 4.8   misfit: 0.15   stationDistributionRatio: 0.55   meanDistP: 45.6   meanDistT: 51.5   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 144°   dip: 76°   rake: 163° Nodal Plane 2: strike: 238°   dip: 73°   rake: 14° Quality: azimuthalGap: 126°   stationPolarityCount: 21   misfit: 0.57   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 44.83   fracAcc30degPref: 0.49   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1786244533920
Event info last updated: 2026.08.09-04:01:01 UTC
Event first association/location: 2026.08.09-03:16:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA