Early-est:     Mindanao, Philippines    2026.02.05-18:36:42.80    q:C      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770316603785.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770316603785.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770316603785.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: 4.2* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Mindanao, Philippines
Origin Time: 2026.02.05-18:36:42.80 UTC
Hypocenter: lat: 7.28°  lon: 123.95°  [+/-27km]    depth: 597km  [+/-37km]
Location Quality: qualityCode:  C     stdErr: 0.8s   assocPhases: 10   usedPhases: 9
minDist: 7.4°   maxDist: 38.1°   AzGap: 167°   2ndAzGap: 188°   atten: -1.56 [+/-0.42]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 27km   azMaxHorUnc: 16°
68%ConfEllipsoid:   semiMajorAxisLength: 38km   majorAxisAzimuth: 165°   majorAxisPlunge: 71°   semiIntermediateAxisLength: 34km   intermediateAxisAzimuth: 20°   intermediateAxisPlunge: 16°   semiMinorAxisLength: 23km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.9Xs [3]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~360km
   Molucca Sea / Sunda [subduction zone]: distance: ~570km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (360km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       597km
       597km
       597km
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.1770316603785.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 28°   dip: 65°   rake: 160°
Nodal Plane 2: strike: 127°   dip: 72°   rake: 27°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 5.1   misfit: 0.00   stationDistributionRatio: 0.46   meanDistP: 50.0   meanDistT: 40.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770316603785.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.1770316603785.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: 165°   stationPolarityCount: 9   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770316603785.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770316603785
Event info last updated: 2026.02.05-19:35:02 UTC
Event first association/location: 2026.02.05-18:44:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA