Early-est:     Vanuatu Islands    2026.10.09-13:51:44.86    q:A      mb:5.2    Mwp:-    Mwpd:-    Td*T50Ex:1.2     fmamp_polarity:./hypo.1791553906569.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791553906569.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791553906569.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791553906569.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 5.2 [59]    Mwp: 5.5X [2]    Mwpd: - [0]
Region: Vanuatu Islands
Origin Time: 2026.10.09-13:51:44.86 UTC
Hypocenter: lat: -15.50°  lon: 168.29°  [+/-15km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 103   usedPhases: 78
minDist: 1.0°   maxDist: 152.4°   AzGap: 58°   2ndAzGap: 63°   atten: -0.89 [+/-0.15]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 15km   azMaxHorUnc: 78°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 76°   majorAxisPlunge: 13°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 337°   intermediateAxisPlunge: 36°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 88%
T50Ex: 0.3 [35]    Td: 3.3s [7]    Td*T50Ex: 1.2 [7]    To: 2.0s [30]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~210km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (210km)
 no
 no
Prob underwater:
 88%
 88%
 88%
Td*T50Ex:
   1.2
   1.2
   1.2
Td*To:
     6.6
     6.6
     6.6
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791553906569.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 42°   dip: 69°   rake: 163°
Nodal Plane 2: strike: 138°   dip: 74°   rake: 22°
Quality: azimuthalGap: -1°   stationPolarityCount: 62   misfitWeightCount: 9.9   misfit: 0.20   stationDistributionRatio: 0.47   meanDistP: 36.3   meanDistT: 49.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791553906569.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 201°   dip: 88°   rake: -177°
Nodal Plane 2: strike: 111°   dip: 87°   rake: -2°
Quality: azimuthalGap: 62°   stationPolarityCount: 62   misfit: 0.32   stationDistributionRatio: 0.53   rmsAngDiffAccPref: 13.31   fracAcc30degPref: 0.98   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791553906569.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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/_amp_aref
./hypo.1791553906569.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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/_amp_mwp
./hypo.1791553906569.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791553906569
Event info last updated: 2026.10.09-14:52:03 UTC
Event first association/location: 2026.10.09-13:57:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI