Early-est:     Hawaii    2026.08.12-03:48:54.15    q:C      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786506528443.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786506528443.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786506528443.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* [26]    Mwp: 5.5X [3]    Mwpd: 5.6Xinv [3]
Region: Hawaii
Origin Time: 2026.08.12-03:48:54.15 UTC
Hypocenter: lat: 20.86°  lon: -154.12°  [+/-131km]    depth: 15km  [+/-33km]
Location Quality: qualityCode:  C     stdErr: 1.5s   assocPhases: 33   usedPhases: 16
minDist: 35.6°   maxDist: 54.5°   AzGap: 295°   2ndAzGap: 297°   atten: -1.47 [+/-1.13]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 30km   maxHorUnc: 131km   azMaxHorUnc: 32°
68%ConfEllipsoid:   semiMajorAxisLength: 163km   majorAxisAzimuth: 212°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 37km   intermediateAxisAzimuth: 303°   intermediateAxisPlunge: 16°   semiMinorAxisLength: 30km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [13]    Td: -s [0]    Td*T50Ex: - [0]    To: 6.0s [12]
Closest plate boundaries:
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
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.1786506528443.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 69°   dip: 35°   rake: -44°
Nodal Plane 2: strike: 197°   dip: 66°   rake: -117°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 6.9   misfit: 0.00   stationDistributionRatio: 0.24   meanDistP: 47.3   meanDistT: 52.8   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786506528443.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.1786506528443.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: 340°   stationPolarityCount: 11   misfit: 0.99   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 22.87   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786506528443.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786506528443
Event info last updated: 2026.08.12-04:47:00 UTC
Event first association/location: 2026.08.12-03:57:05 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA