Early-est:     Talaud Islands, Indonesia    2025.04.09-07:24:57.67    q:C      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1744183497674.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1744183497674.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1744183497674.mech.hash.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* [9]    Mwp: 4.6X [1]    Mwpd: - [0]
Region: Talaud Islands, Indonesia
Origin Time: 2025.04.09-07:24:57.67 UTC
Hypocenter: lat: 4.89°  lon: 127.68°  [+/-26km]    depth: 15km  [+/-23km]
Location Quality: qualityCode:  C     stdErr: 2.4s   assocPhases: 11   usedPhases: 11
minDist: 4.1°   maxDist: 30.5°   AzGap: 144°   2ndAzGap: 284°   atten: -2.03 [+/-0.45]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 26km   azMaxHorUnc: 19°
68%ConfEllipsoid:   semiMajorAxisLength: 33km   majorAxisAzimuth: 193°   majorAxisPlunge: 21°   semiIntermediateAxisLength: 25km   intermediateAxisAzimuth: 86°   intermediateAxisPlunge: 38°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [8]    Td: 0.9Xs [1]    Td*T50Ex: - [0]    To: 15.7s [6]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~40km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (40km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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)
./hypo.1744183497674.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 51°   dip: 60°   rake: 168°
Nodal Plane 2: strike: 147°   dip: 80°   rake: 30°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 4.9   misfit: 0.00   stationDistributionRatio: 0.27   meanDistP: 52.6   meanDistT: 48.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1744183497674.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1744183497674.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 284°   stationPolarityCount: 9   misfit: 0.99   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 45.44   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1744183497674.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1744183497674
Event info last updated: 2025.04.09-08:23:00 UTC
Event first association/location: 2025.04.09-07:39:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA