Early-est:     Minahassa Peninsula, Sulawesi    2025.08.04-06:00:33.57    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754287233852.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754287233852.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754287233852.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* [13]    Mwp: - [0]    Mwpd: - [0]
Region: Minahassa Peninsula, Sulawesi
Origin Time: 2025.08.04-06:00:33.57 UTC
Hypocenter: lat: 0.27°  lon: 122.03°  [+/-15km]    depth: 165km  [+/-16km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 48   usedPhases: 20
minDist: 1.5°   maxDist: 169.9°   AzGap: 114°   2ndAzGap: 145°   atten: -0.86 [+/-0.36]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 47°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 226°   majorAxisPlunge: 7°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 134°   intermediateAxisPlunge: 15°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [9]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [9]
Closest plate boundaries:
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 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.1754287233852.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 103°   dip: 46°   rake: -151°
Nodal Plane 2: strike: 352°   dip: 69°   rake: -48°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 5.5   misfit: 0.11   stationDistributionRatio: 0.54   meanDistP: 50.4   meanDistT: 52.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754287233852.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.1754287233852.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: 154°   stationPolarityCount: 14   misfit: 0.99   stationDistributionRatio: 0.75   rmsAngDiffAccPref: 36.65   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754287233852.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754287233852
Event info last updated: 2025.08.04-06:59:01 UTC
Event first association/location: 2025.08.04-06:07:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA