Early-est:     Philippine Islands Region    2025.01.26-18:45:57.80    q:B      mb:4.9    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 4.9 [31]    Mwp: - [0]    Mwpd: - [0] Region: Philippine Islands Region Origin Time: 2025.01.26-18:45:57.80 UTC Hypocenter: lat: 5.72°  lon: 127.02°  [+/-20km]    depth: 116km  [+/-25km] Location Quality: qualityCode:  B     stdErr: 0.7s   assocPhases: 64   usedPhases: 38 minDist: 7.6°   maxDist: 151.3°   AzGap: 69°   2ndAzGap: 129°   atten: -0.99 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 20km   azMaxHorUnc: 90° 68%ConfEllipsoid:   semiMajorAxisLength: 31km   majorAxisAzimuth: 89°   majorAxisPlunge: 46°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 339°   intermediateAxisPlunge: 18°   semiMinorAxisLength: 18km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [15]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.4s [11] Closest plate boundaries:    Philippine Sea \ Sunda [subduction zone]: distance: ~50km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (50km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        116km        116km        116km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 17°   dip: 20°   rake: -7° Nodal Plane 2: strike: 113°   dip: 88°   rake: -110° Quality: azimuthalGap: -1°   stationPolarityCount: 34   misfitWeightCount: 8.6   misfit: 0.20   stationDistributionRatio: 0.34   meanDistP: 29.7   meanDistT: 37.1   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 102°   dip: 84°   rake: -124° Nodal Plane 2: strike: 4°   dip: 35°   rake: -10° Quality: azimuthalGap: 145°   stationPolarityCount: 34   misfit: 0.40   stationDistributionRatio: 0.80   rmsAngDiffAccPref: 36.61   fracAcc30degPref: 0.57   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
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
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

Event ID: smi:KOERI/ee/event/1737917158638
Event info last updated: 2025.01.26-19:46:01 UTC
Event first association/location: 2025.01.26-18:52:20 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI