Early-est:     Loyalty Islands    2026.09.26-10:21:11.65    q:C      mb:4.8*    Mwp:5.2    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790418069723.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790418069723.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790418069723.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* [20]    Mwp: 5.2 [4]    Mwpd: - [0]
Region: Loyalty Islands
Origin Time: 2026.09.26-10:21:11.65 UTC
Hypocenter: lat: -20.85°  lon: 168.69°  [+/-33km]    depth: 62km  [+/-39km]
Location Quality: qualityCode:  C     stdErr: 1.8s   assocPhases: 70   usedPhases: 34
minDist: 0.9°   maxDist: 152.3°   AzGap: 177°   2ndAzGap: 180°   atten: -1.52 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 22km   maxHorUnc: 33km   azMaxHorUnc: 61°
68%ConfEllipsoid:   semiMajorAxisLength: 48km   majorAxisAzimuth: 56°   majorAxisPlunge: 42°   semiIntermediateAxisLength: 30km   intermediateAxisAzimuth: 287°   intermediateAxisPlunge: 34°   semiMinorAxisLength: 26km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [14]    Td: -s [0]    Td*T50Ex: - [0]    To: 13.4s [12]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~10km
Subduction geometry:    Zone: Santa Cruz Islands/Vanuatu/Loyalty Islands: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (10km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       5.2
       5.2
       5.2
Hypocenter depth:
       62km
       62km
       62km
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.1790418069723.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 78°   dip: 25°   rake: 24°
Nodal Plane 2: strike: 326°   dip: 80°   rake: 113°
Quality: azimuthalGap: -1°   stationPolarityCount: 26   misfitWeightCount: 6.1   misfit: 0.25   stationDistributionRatio: 0.35   meanDistP: 48.8   meanDistT: 50.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790418069723.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.1790418069723.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 89°   dip: 26°   rake: 56°
Nodal Plane 2: strike: 306°   dip: 68°   rake: 105°
Quality: azimuthalGap: 111°   stationPolarityCount: 26   misfit: 0.46   stationDistributionRatio: 0.55   rmsAngDiffAccPref: 40.56   fracAcc30degPref: 0.41   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790418069723.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790418069723
Event info last updated: 2026.09.26-11:20:00 UTC
Event first association/location: 2026.09.26-10:27:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA