Early-est:     New Caledonia    2026.09.26-07:23:05.44    q:D      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790407385432.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790407385432.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790407385432.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* [18]    Mwp: - [0]    Mwpd: - [0]
Region: New Caledonia
Origin Time: 2026.09.26-07:23:05.44 UTC
Hypocenter: lat: -21.78°  lon: 166.02°  [+/-64km]    depth: 227km  [+/-164km]
Location Quality: qualityCode:  D     stdErr: 1.9s   assocPhases: 56   usedPhases: 13
minDist: 18.5°   maxDist: 152.0°   AzGap: 222°   2ndAzGap: 238°   atten: -0.88 [+/-0.54]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 31km   maxHorUnc: 64km   azMaxHorUnc: 58°
68%ConfEllipsoid:   semiMajorAxisLength: 179km   majorAxisAzimuth: 240°   majorAxisPlunge: 66°   semiIntermediateAxisLength: 40km   intermediateAxisAzimuth: 6°   intermediateAxisPlunge: 15°   semiMinorAxisLength: 36km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 1%
T50Ex: 0.0 [4]    Td: -s [0]    Td*T50Ex: - [0]    To: 15.0s [4]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~290km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (290km)
 no
 no
Prob underwater:
 1%
 1%
 1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       227km
       227km
       227km
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.1790407385432.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 15°   dip: 3°   rake: -145°
Nodal Plane 2: strike: 249°   dip: 88°   rake: -87°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 5.0   misfit: 0.10   stationDistributionRatio: 0.36   meanDistP: 49.7   meanDistT: 39.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790407385432.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.1790407385432.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: 222°   stationPolarityCount: 18   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790407385432.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790407385432
Event info last updated: 2026.09.26-08:22:01 UTC
Event first association/location: 2026.09.26-07:35:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA