Early-est:     Mindanao, Philippines    2026.10.13-15:21:45.88    q:B      mb:4.7    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791904906524.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791904906524.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791904906524.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791904906524.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.7 [12]    Mwp: - [0]    Mwpd: - [0]
Region: Mindanao, Philippines
Origin Time: 2026.10.13-15:21:45.88 UTC
Hypocenter: lat: 5.31°  lon: 125.68°  [+/-12km]    depth: 71km  [+/-19km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 36   usedPhases: 18
minDist: 1.8°   maxDist: 89.4°   AzGap: 83°   2ndAzGap: 125°   atten: -0.89 [+/-0.43]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 12km   azMaxHorUnc: 150°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 263°   majorAxisPlunge: 80°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 153°   intermediateAxisPlunge: 3°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 42.0s [4]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~200km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (200km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       71km
       71km
       71km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791904906524.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 34°   dip: 58°   rake: -21°
Nodal Plane 2: strike: 136°   dip: 72°   rake: -146°
Quality: azimuthalGap: -1°   stationPolarityCount: 15   misfitWeightCount: 5.4   misfit: 0.13   stationDistributionRatio: 0.39   meanDistP: 41.5   meanDistT: 43.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791904906524.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 288°   dip: 23°   rake: 149°
Nodal Plane 2: strike: 47°   dip: 78°   rake: 70°
Quality: azimuthalGap: 125°   stationPolarityCount: 15   misfit: 0.34   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 47.44   fracAcc30degPref: 0.36   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791904906524.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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/_amp_aref
./hypo.1791904906524.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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/_amp_mwp
./hypo.1791904906524.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791904906524
Event info last updated: 2026.10.13-16:21:51 UTC
Event first association/location: 2026.10.13-15:28:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI