Early-est:     Philippine Islands Region    2026.06.25-21:17:50.63    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:./hypo.1782422269316.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782422269316.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782422269316.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* [56]    Mwp: 4.8X [2]    Mwpd: 5.3Xinv [3]
Region: Philippine Islands Region
Origin Time: 2026.06.25-21:17:50.63 UTC
Hypocenter: lat: 9.89°  lon: 127.06°  [+/-23km]    depth: 15km  [+/-24km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 99   usedPhases: 75
minDist: 3.2°   maxDist: 152.9°   AzGap: 80°   2ndAzGap: 83°   atten: -0.96 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 23km   azMaxHorUnc: 70°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 248°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 25km   intermediateAxisAzimuth: 148°   intermediateAxisPlunge: 63°   semiMinorAxisLength: 18km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [40]    Td: 1.4s [6]    Td*T50Ex: 0.7 [6]    To: 3.0s [40]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~60km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (60km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.7
   0.7
   0.7
Td*To:
     4.2
     4.2
     4.2
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1782422269316.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 53°   dip: 46°   rake: -11°
Nodal Plane 2: strike: 151°   dip: 82°   rake: -135°
Quality: azimuthalGap: -1°   stationPolarityCount: 56   misfitWeightCount: 10.7   misfit: 0.09   stationDistributionRatio: 0.35   meanDistP: 42.4   meanDistT: 34.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782422269316.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.1782422269316.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 41°   dip: 32°   rake: -13°
Nodal Plane 2: strike: 142°   dip: 83°   rake: -121°
Quality: azimuthalGap: 82°   stationPolarityCount: 56   misfit: 0.29   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 29.90   fracAcc30degPref: 0.61   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782422269316.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782422269316
Event info last updated: 2026.06.25-22:16:03 UTC
Event first association/location: 2026.06.25-21:24:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA