Early-est:     Minahassa Peninsula, Sulawesi    2025.07.31-22:13:25.00    q:A      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:0.0     fmamp_polarity:./hypo.1754000005857.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754000005857.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754000005857.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: 5.1* [52]    Mwp: 4.8X [1]    Mwpd: - [0]
Region: Minahassa Peninsula, Sulawesi
Origin Time: 2025.07.31-22:13:25.00 UTC
Hypocenter: lat: -0.04°  lon: 123.21°  [+/-14km]    depth: 118km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 94   usedPhases: 66
minDist: 1.1°   maxDist: 159.7°   AzGap: 34°   2ndAzGap: 42°   atten: -0.94 [+/-0.18]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 30°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 23°   majorAxisPlunge: 40°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 254°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [37]    Td: 2.2s [5]    Td*T50Ex: 0.0 [5]    To: 1.5s [36]
Closest plate boundaries:
   Molucca Sea - Sunda [continental transform fault]: distance: ~100km
   Molucca Sea / Sunda [subduction zone]: distance: ~230km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (230km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.0
   0.0
   0.0
Td*To:
     3.3
     3.3
     3.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       118km
       118km
       118km
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.1754000005857.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 133°   dip: 37°   rake: 33°
Nodal Plane 2: strike: 15°   dip: 71°   rake: 122°
Quality: azimuthalGap: -1°   stationPolarityCount: 53   misfitWeightCount: 16.6   misfit: 0.28   stationDistributionRatio: 0.50   meanDistP: 45.7   meanDistT: 49.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754000005857.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.1754000005857.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 83°   dip: 27°   rake: 1°
Nodal Plane 2: strike: 352°   dip: 90°   rake: 117°
Quality: azimuthalGap: 76°   stationPolarityCount: 53   misfit: 0.33   stationDistributionRatio: 0.79   rmsAngDiffAccPref: 39.63   fracAcc30degPref: 0.62   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754000005857.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754000005857
Event info last updated: 2025.07.31-23:12:01 UTC
Event first association/location: 2025.07.31-22:19:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA