Early-est:     Mindanao, Philippines    2026.10.07-16:42:50.91    q:B      mb:4.8    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791391369920.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791391369920.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791391369920.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791391369920.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: 4.8 [31]    Mwp: - [0]    Mwpd: - [0]
Region: Mindanao, Philippines
Origin Time: 2026.10.07-16:42:50.91 UTC
Hypocenter: lat: 5.28°  lon: 126.01°  [+/-18km]    depth: 115km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 70   usedPhases: 37
minDist: 1.8°   maxDist: 123.0°   AzGap: 59°   2ndAzGap: 91°   atten: -1.32 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 18km   azMaxHorUnc: 85°
68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 84°   majorAxisPlunge: 13°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 324°   intermediateAxisPlunge: 65°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [19]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [15]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~170km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (170km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       115km
       115km
       115km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791391369920.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 169°   dip: 46°   rake: 38°
Nodal Plane 2: strike: 50°   dip: 63°   rake: 129°
Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 12.2   misfit: 0.17   stationDistributionRatio: 0.52   meanDistP: 31.6   meanDistT: 21.2   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791391369920.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 325°   dip: 31°   rake: 113°
Nodal Plane 2: strike: 118°   dip: 62°   rake: 77°
Quality: azimuthalGap: 104°   stationPolarityCount: 31   misfit: 0.16   stationDistributionRatio: 0.80   rmsAngDiffAccPref: 20.42   fracAcc30degPref: 0.94   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791391369920.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
./hypo.1791391369920.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp
./hypo.1791391369920.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791391369920
Event info last updated: 2026.10.07-17:43:04 UTC
Event first association/location: 2026.10.07-16:48:03 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI