Early-est:     Talaud Islands, Indonesia    2025.04.09-15:21:27.46    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* [9]    Mwp: - [0]    Mwpd: - [0] Region: Talaud Islands, Indonesia Origin Time: 2025.04.09-15:21:27.46 UTC Hypocenter: lat: 3.45°  lon: 127.54°  [+/-11km]    depth: 84km  [+/-18km] Location Quality: qualityCode:  C     stdErr: 1.5s   assocPhases: 29   usedPhases: 10 minDist: 6.6°   maxDist: 147.2°   AzGap: 176°   2ndAzGap: 182°   atten: -1.83 [+/-0.59] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 11km   azMaxHorUnc: 50° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 211°   majorAxisPlunge: 80°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 54°   intermediateAxisPlunge: 9°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [11]    Td: 0.8Xs [1]    Td*T50Ex: - [0]    To: 17.4s [10] Closest plate boundaries:    Sunda - Birds Head [continental convergent boundary]: distance: ~130km    Philippine Sea \ Sunda [subduction zone]: distance: ~130km    Birds Head / Sunda [subduction zone]: distance: ~140km    Molucca Sea \ Sunda [subduction zone]: distance: ~230km    Molucca Sea \ Birds Head [subduction zone]: distance: ~230km    Birds Head / Philippine Sea [subduction zone]: distance: ~320km    Molucca Sea / Sunda [subduction zone]: distance: ~400km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (130km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        84km        84km        84km 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: 262°   dip: 43°   rake: 156° Nodal Plane 2: strike: 10°   dip: 74°   rake: 50° Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 5.7   misfit: 0.05   stationDistributionRatio: 0.39   meanDistP: 47.0   meanDistT: 48.3   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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 259°   dip: 34°   rake: 154° Nodal Plane 2: strike: 11°   dip: 76°   rake: 58° Quality: azimuthalGap: 96°   stationPolarityCount: 11   misfit: 0.11   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 39.30   fracAcc30degPref: 0.51   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1744212087493
Event info last updated: 2025.04.09-16:20:00 UTC
Event first association/location: 2025.04.09-15:28:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA