Early-est:     Loyalty Islands    2026.09.25-23:52:40.50    q:C      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790380360945.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790380360945.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790380360945.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: 5.1* [10]    Mwp: - [0]    Mwpd: - [0]
Region: Loyalty Islands
Origin Time: 2026.09.25-23:52:40.50 UTC
Hypocenter: lat: -21.13°  lon: 168.47°  [+/-41km]    depth: 30km  [+/-40km]
Location Quality: qualityCode:  C     stdErr: 2.1s   assocPhases: 62   usedPhases: 34
minDist: 0.5°   maxDist: 152.5°   AzGap: 102°   2ndAzGap: 184°   atten: -1.45 [+/-0.41]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 31km   maxHorUnc: 41km   azMaxHorUnc: 25°
68%ConfEllipsoid:   semiMajorAxisLength: 51km   majorAxisAzimuth: 205°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 40km   intermediateAxisAzimuth: 319°   intermediateAxisPlunge: 78°   semiMinorAxisLength: 38km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.2 [11]    Td: -s [0]    Td*T50Ex: - [0]    To: 15.3s [10]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~30km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       30km
       30km
       30km
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.1790380360945.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 58°   dip: 50°   rake: 48°
Nodal Plane 2: strike: 293°   dip: 55°   rake: 129°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 4.9   misfit: 0.07   stationDistributionRatio: 0.27   meanDistP: 50.9   meanDistT: 52.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790380360945.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.1790380360945.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 67°   dip: 33°   rake: 91°
Nodal Plane 2: strike: 246°   dip: 57°   rake: 89°
Quality: azimuthalGap: 131°   stationPolarityCount: 17   misfit: 0.34   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 45.16   fracAcc30degPref: 0.42   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790380360945.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790380360945
Event info last updated: 2026.09.26-00:51:00 UTC
Event first association/location: 2026.09.26-00:03:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA