Early-est:     Philippine Islands Region    2026.02.14-17:23:01.40    q:A      mb:5.2*    Mwp:5.5    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:./hypo.1771089779487.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1771089779487.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1771089779487.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: 5.2* [57]    Mwp: 5.5 [5]    Mwpd: 5.7Xinv [6]
Region: Philippine Islands Region
Origin Time: 2026.02.14-17:23:01.40 UTC
Hypocenter: lat: 5.72°  lon: 127.28°  [+/-14km]    depth: 55km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 108   usedPhases: 79
minDist: 2.2°   maxDist: 151.2°   AzGap: 76°   2ndAzGap: 87°   atten: -0.67 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 134°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 299°   majorAxisPlunge: 51°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 165°   intermediateAxisPlunge: 29°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [47]    Td: 1.4s [5]    Td*T50Ex: 0.7 [5]    To: 10.6s [46]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~30km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.7
   0.7
   0.7
Td*To:
     14.8
     14.8
     14.8
Mwp magnitude:
       5.5
       5.5
       5.5
Hypocenter depth:
       55km
       55km
       55km
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.1771089779487.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 121°   dip: 35°   rake: 76°
Nodal Plane 2: strike: 317°   dip: 56°   rake: 100°
Quality: azimuthalGap: -1°   stationPolarityCount: 60   misfitWeightCount: 15.6   misfit: 0.16   stationDistributionRatio: 0.59   meanDistP: 28.2   meanDistT: 35.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1771089779487.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.1771089779487.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 319°   dip: 70°   rake: -157°
Nodal Plane 2: strike: 220°   dip: 68°   rake: -22°
Quality: azimuthalGap: 84°   stationPolarityCount: 60   misfit: 0.29   stationDistributionRatio: 0.75   rmsAngDiffAccPref: 17.89   fracAcc30degPref: 0.94   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1771089779487.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1771089779487
Event info last updated: 2026.02.14-18:22:00 UTC
Event first association/location: 2026.02.14-17:29:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA