Early-est:     Solomon Islands    2026.10.02-04:45:22.86    q:B      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790916326159.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790916326159.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790916326159.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: 4.6* [14]    Mwp: - [0]    Mwpd: - [0]
Region: Solomon Islands
Origin Time: 2026.10.02-04:45:22.86 UTC
Hypocenter: lat: -9.32°  lon: 157.44°  [+/-13km]    depth: 230km  [+/-27km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 16   usedPhases: 13
minDist: 14.7°   maxDist: 92.7°   AzGap: 121°   2ndAzGap: 153°   atten: -1.62 [+/-0.55]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 19°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 243°   majorAxisPlunge: 73°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 3°   intermediateAxisPlunge: 9°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [9]    Td: -s [0]    Td*T50Ex: - [0]    To: 8.9s [9]
Closest plate boundaries:
   Pacific / Australia [subduction zone]: distance: ~40km
   Woodlark - Australia [oceanic transform fault]: distance: ~110km
   Pacific / Woodlark [subduction zone]: distance: ~180km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (40km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       230km
       230km
       230km
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.1790916326159.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 65°   dip: 28°   rake: -41°
Nodal Plane 2: strike: 193°   dip: 72°   rake: -112°
Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 5.8   misfit: 0.05   stationDistributionRatio: 0.43   meanDistP: 46.9   meanDistT: 46.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790916326159.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.1790916326159.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 334°   dip: 28°   rake: -125°
Nodal Plane 2: strike: 192°   dip: 68°   rake: -73°
Quality: azimuthalGap: 120°   stationPolarityCount: 13   misfit: 0.24   stationDistributionRatio: 0.83   rmsAngDiffAccPref: 35.61   fracAcc30degPref: 0.57   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790916326159.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790916326159
Event info last updated: 2026.10.02-05:44:05 UTC
Event first association/location: 2026.10.02-04:53:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA