Early-est:     Vanuatu Islands    2026.03.30-19:50:28.56    q:C      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1774900237368.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774900237368.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774900237368.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: 4.9* [14]    Mwp: - [0]    Mwpd: - [0]
Region: Vanuatu Islands
Origin Time: 2026.03.30-19:50:28.56 UTC
Hypocenter: lat: -14.63°  lon: 167.28°  [+/-53km]    depth: 90km  [+/-34km]
Location Quality: qualityCode:  C     stdErr: 0.6s   assocPhases: 38   usedPhases: 15
minDist: 6.9°   maxDist: 140.1°   AzGap: 193°   2ndAzGap: 202°   atten: -1.79 [+/-0.37]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 53km   azMaxHorUnc: 32°
68%ConfEllipsoid:   semiMajorAxisLength: 71km   majorAxisAzimuth: 211°   majorAxisPlunge: 23°   semiIntermediateAxisLength: 23km   intermediateAxisAzimuth: 88°   intermediateAxisPlunge: 53°   semiMinorAxisLength: 19km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 5.1s [6]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~110km
   New Hebrides - Pacific [continental convergent boundary]: distance: ~110km
   Pacific / Australia [subduction zone]: distance: ~150km
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 (110km)
 YES (110km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       90km
       90km
       90km
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.1774900237368.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 127°   dip: 14°   rake: -25°
Nodal Plane 2: strike: 241°   dip: 84°   rake: -103°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 3.7   misfit: 0.00   stationDistributionRatio: 0.50   meanDistP: 48.2   meanDistT: 41.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774900237368.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.1774900237368.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: 193°   stationPolarityCount: 11   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774900237368.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774900237368
Event info last updated: 2026.03.30-20:49:00 UTC
Event first association/location: 2026.03.30-19:59:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA