Early-est:     Talaud Islands, Indonesia    2025.06.01-02:01:14.83    q:B      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1748743280938.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1748743280938.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1748743280938.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: 4.1* [5]    Mwp: - [0]    Mwpd: - [0]
Region: Talaud Islands, Indonesia
Origin Time: 2025.06.01-02:01:14.83 UTC
Hypocenter: lat: 2.30°  lon: 125.54°  [+/-25km]    depth: 165km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 0.5s   assocPhases: 11   usedPhases: 7
minDist: 2.4°   maxDist: 118.2°   AzGap: 102°   2ndAzGap: 188°   atten: -2.38 [+/-0.66]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 25km   azMaxHorUnc: 163°
68%ConfEllipsoid:   semiMajorAxisLength: 32km   majorAxisAzimuth: 343°   majorAxisPlunge: 2°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 253°   intermediateAxisPlunge: 0°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.7s [4]
Closest plate boundaries:
   Birds Head / Sunda [subduction zone]: distance: ~120km
   Molucca Sea \ Sunda [subduction zone]: distance: ~120km
   Molucca Sea \ Birds Head [subduction zone]: distance: ~120km
   Sunda - Birds Head [oceanic convergent boundary]: distance: ~150km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (120km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       165km
       165km
       165km
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.1748743280938.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 257°   dip: 43°   rake: 94°
Nodal Plane 2: strike: 72°   dip: 47°   rake: 87°
Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 5.0   misfit: 0.00   stationDistributionRatio: 0.48   meanDistP: 50.8   meanDistT: 43.7   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1748743280938.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.1748743280938.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 303°   dip: 36°   rake: 142°
Nodal Plane 2: strike: 65°   dip: 69°   rake: 60°
Quality: azimuthalGap: 115°   stationPolarityCount: 8   misfit: 0.30   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 41.22   fracAcc30degPref: 0.34   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1748743280938.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1748743280938
Event info last updated: 2025.06.01-03:00:01 UTC
Event first association/location: 2025.06.01-02:08:04 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA