Early-est:     Mindanao, Philippines    2026.06.18-06:57:36.47    q:A      mb:5.2*    Mwp:5.3    Mwpd:-    Td*T50Ex:0.6     fmamp_polarity:./hypo.1781765856256.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781765856256.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781765856256.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* [37]    Mwp: 5.3 [4]    Mwpd: 5.3Xinv [3]
Region: Mindanao, Philippines
Origin Time: 2026.06.18-06:57:36.47 UTC
Hypocenter: lat: 5.67°  lon: 125.29°  [+/-19km]    depth: 77km  [+/-25km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 94   usedPhases: 68
minDist: 1.4°   maxDist: 163.1°   AzGap: 47°   2ndAzGap: 64°   atten: -1.06 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 19km   azMaxHorUnc: 78°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 90°   majorAxisPlunge: 48°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 209°   intermediateAxisPlunge: 24°   semiMinorAxisLength: 18km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 89%
T50Ex: 0.5 [30]    Td: 1.2s [6]    Td*T50Ex: 0.6 [6]    To: 9.3s [29]
Closest plate boundaries:
   Philippine Sea \ Sunda [subduction zone]: distance: ~230km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (230km)
 no
 no
Prob underwater:
 89%
 89%
 89%
Td*T50Ex:
   0.6
   0.6
   0.6
Td*To:
     11.2
     11.2
     11.2
Mwp magnitude:
       5.3
       5.3
       5.3
Hypocenter depth:
       77km
       77km
       77km
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.1781765856256.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 84°   dip: 71°   rake: 166°
Nodal Plane 2: strike: 179°   dip: 76°   rake: 19°
Quality: azimuthalGap: -1°   stationPolarityCount: 39   misfitWeightCount: 15.6   misfit: 0.25   stationDistributionRatio: 0.52   meanDistP: 42.3   meanDistT: 48.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781765856256.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.1781765856256.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 294°   dip: 75°   rake: 154°
Nodal Plane 2: strike: 31°   dip: 65°   rake: 17°
Quality: azimuthalGap: 73°   stationPolarityCount: 39   misfit: 0.44   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 41.43   fracAcc30degPref: 0.51   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781765856256.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781765856256
Event info last updated: 2026.06.18-07:56:00 UTC
Event first association/location: 2026.06.18-07:02:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA