Early-est:     Vanuatu Islands    2026.03.30-09:02:33.56    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1774861353224.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774861353224.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774861353224.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* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Vanuatu Islands
Origin Time: 2026.03.30-09:02:33.56 UTC
Hypocenter: lat: -15.54°  lon: 167.50°  [+/-19km]    depth: 136km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 19   usedPhases: 15
minDist: 6.0°   maxDist: 146.9°   AzGap: 189°   2ndAzGap: 208°   atten: -2.56 [+/-0.33]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 19km   azMaxHorUnc: 55°
68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 235°   majorAxisPlunge: 0°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 145°   intermediateAxisPlunge: 79°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.2s [8]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~130km
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 (130km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       136km
       136km
       136km
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.1774861353224.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 54°   dip: 27°   rake: -25°
Nodal Plane 2: strike: 166°   dip: 79°   rake: -115°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 4.3   misfit: 0.07   stationDistributionRatio: 0.45   meanDistP: 47.4   meanDistT: 41.0   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774861353224.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.1774861353224.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: 155°   stationPolarityCount: 14   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774861353224.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774861353224
Event info last updated: 2026.03.30-10:01:01 UTC
Event first association/location: 2026.03.30-09:09:27 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA