Early-est:     Philippine Islands Region    2026.06.24-01:34:20.52    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782264858486.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782264858486.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782264858486.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: 4.8* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Philippine Islands Region
Origin Time: 2026.06.24-01:34:20.52 UTC
Hypocenter: lat: 16.22°  lon: 118.92°  [+/-16km]    depth: 5km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 49   usedPhases: 18
minDist: 9.1°   maxDist: 82.7°   AzGap: 162°   2ndAzGap: 174°   atten: -0.79 [+/-0.42]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 16km   azMaxHorUnc: 30°
68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 212°   majorAxisPlunge: 29°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 305°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [4]    Td: 0.5Xs [2]    Td*T50Ex: - [0]    To: 2.7s [4]
Closest plate boundaries:
   Philippine Sea - Sunda [continental transform fault]: distance: ~50km
   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
 YES (50km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       5km
       5km
       5km
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.1782264858486.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 160°   dip: 34°   rake: -128°
Nodal Plane 2: strike: 23°   dip: 64°   rake: -68°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 1.7   misfit: 0.08   stationDistributionRatio: 0.25   meanDistP: 50.3   meanDistT: 55.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782264858486.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.1782264858486.mech.fmamp_polarity_waveform.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: 165°   stationPolarityCount: 17   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782264858486.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782264858486
Event info last updated: 2026.06.24-02:33:00 UTC
Event first association/location: 2026.06.24-02:08:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA