Early-est:     W. Caroline Islands, Micronesia    2026.06.23-01:56:54.45    q:A      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782179817783.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782179817783.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782179817783.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* [53]    Mwp: - [0]    Mwpd: - [0]
Region: W. Caroline Islands, Micronesia
Origin Time: 2026.06.23-01:56:54.45 UTC
Hypocenter: lat: 11.50°  lon: 140.68°  [+/-13km]    depth: 74km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 86   usedPhases: 65
minDist: 4.6°   maxDist: 151.6°   AzGap: 41°   2ndAzGap: 63°   atten: -1.29 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 13km   azMaxHorUnc: 166°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 350°   majorAxisPlunge: 53°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 88°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [28]    Td: 1.8Xs [1]    Td*T50Ex: - [0]    To: 15.2s [26]
Closest plate boundaries:
   Philippine Sea / Pacific [subduction zone]: distance: ~70km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (70km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       74km
       74km
       74km
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.1782179817783.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 113°   dip: 7°   rake: 61°
Nodal Plane 2: strike: 322°   dip: 84°   rake: 93°
Quality: azimuthalGap: -1°   stationPolarityCount: 48   misfitWeightCount: 11.1   misfit: 0.15   stationDistributionRatio: 0.55   meanDistP: 40.7   meanDistT: 38.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782179817783.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.1782179817783.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 213°   dip: 66°   rake: -155°
Nodal Plane 2: strike: 112°   dip: 67°   rake: -26°
Quality: azimuthalGap: 73°   stationPolarityCount: 48   misfit: 0.27   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 16.02   fracAcc30degPref: 0.97   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782179817783.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782179817783
Event info last updated: 2026.06.23-02:55:01 UTC
Event first association/location: 2026.06.23-02:05:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA