Early-est:     Vanuatu Islands    2026.02.10-20:02:53.12    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770753775532.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770753775532.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770753775532.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: 4.7* [21]    Mwp: - [0]    Mwpd: - [0]
Region: Vanuatu Islands
Origin Time: 2026.02.10-20:02:53.12 UTC
Hypocenter: lat: -15.22°  lon: 168.05°  [+/-13km]    depth: 84km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 54   usedPhases: 27
minDist: 6.4°   maxDist: 148.3°   AzGap: 191°   2ndAzGap: 194°   atten: -1.78 [+/-0.29]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 35°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 216°   majorAxisPlunge: 34°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 311°   intermediateAxisPlunge: 8°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 91%
T50Ex: 0.5 [10]    Td: 1.0Xs [2]    Td*T50Ex: - [0]    To: 1.4s [10]
Closest plate boundaries:
   New Hebrides - Pacific [oceanic spreading ridge]: distance: ~190km
   New Hebrides / Australia [subduction zone]: distance: ~190km
   Pacific / Australia [subduction zone]: distance: ~260km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (190km)
 no
 no
Prob underwater:
 91%
 91%
 91%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       84km
       84km
       84km
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.1770753775532.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 146°   dip: 16°   rake: 175°
Nodal Plane 2: strike: 240°   dip: 89°   rake: 74°
Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 5.7   misfit: 0.11   stationDistributionRatio: 0.50   meanDistP: 39.6   meanDistT: 44.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770753775532.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.1770753775532.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 151°   dip: 26°   rake: -173°
Nodal Plane 2: strike: 55°   dip: 87°   rake: -64°
Quality: azimuthalGap: 132°   stationPolarityCount: 22   misfit: 0.30   stationDistributionRatio: 0.61   rmsAngDiffAccPref: 42.09   fracAcc30degPref: 0.49   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770753775532.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770753775532
Event info last updated: 2026.02.10-21:01:02 UTC
Event first association/location: 2026.02.10-20:11:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA