Early-est:     Mindanao, Philippines    2025.12.13-16:34:10.31    q:B      mb:4.5    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765643650345.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765643650345.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765643650345.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765643650345.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: 4.5 [14]    Mwp: - [0]    Mwpd: - [0]
Region: Mindanao, Philippines
Origin Time: 2025.12.13-16:34:10.31 UTC
Hypocenter: lat: 5.58°  lon: 126.60°  [+/-13km]    depth: 96km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 20   usedPhases: 17
minDist: 1.8°   maxDist: 148.1°   AzGap: 111°   2ndAzGap: 185°   atten: -1.78 [+/-0.39]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 88°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 61°   majorAxisPlunge: 68°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 274°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [10]    Td: 2.4Xs [1]    Td*T50Ex: - [0]    To: 8.4s [6]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~100km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       96km
       96km
       96km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1765643650345.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 63°   dip: 68°   rake: 167°
Nodal Plane 2: strike: 158°   dip: 78°   rake: 23°
Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 2.8   misfit: 0.06   stationDistributionRatio: 0.30   meanDistP: 47.8   meanDistT: 43.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765643650345.mech.fmamp_polarity.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: 256°   stationPolarityCount: 10   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765643650345.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.1765643650345.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.1765643650345.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765643650345
Event info last updated: 2025.12.13-17:34:25 UTC
Event first association/location: 2025.12.13-16:50:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI