Early-est:     Vanuatu Islands    2024.12.21-15:30:57.63    q:B      mb:5.5    Mwp:6.0*    Mwpd:-    Td*T50Ex:1.6     fmamp_polarity:./hypo.1734795054861.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1734795054861.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1734795054861.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: 5.5 [81]    Mwp: 6.0* [31]    Mwpd: 6.2Xinv [30]
Region: Vanuatu Islands
Origin Time: 2024.12.21-15:30:57.63 UTC
Hypocenter: lat: -17.73°  lon: 168.07°  [+/-29km]    depth: 84km  [+/-52km]
Location Quality: qualityCode:  B     stdErr: 1.9s   assocPhases: 301   usedPhases: 202
minDist: 4.6°   maxDist: 167.0°   AzGap: 20°   2ndAzGap: 31°   atten: -1.55 [+/-0.17]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 22km   maxHorUnc: 29km   azMaxHorUnc: 177°
68%ConfEllipsoid:   semiMajorAxisLength: 53km   majorAxisAzimuth: 167°   majorAxisPlunge: 76°   semiIntermediateAxisLength: 34km   intermediateAxisAzimuth: 0°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 28km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [77]    Td: 3.3s [26]    Td*T50Ex: 1.6 [26]    To: 6.2s [76]
Closest plate boundaries:
   New Hebrides / Australia [subduction zone]: distance: ~80km
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 (80km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.6
   1.6
   1.6
Td*To:
     20.5
     20.5
     20.5
Mwp magnitude:
       6.0*
       6.0*
       6.0*
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.1734795054861.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 156°   dip: 43°   rake: 163°
Nodal Plane 2: strike: 259°   dip: 78°   rake: 48°
Quality: azimuthalGap: -1°   stationPolarityCount: 88   misfitWeightCount: 29.5   misfit: 0.17   stationDistributionRatio: 0.54   meanDistP: 18.0   meanDistT: 13.1   qualityCode: A
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1734795054861.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 131°   dip: 41°   rake: 137°
Nodal Plane 2: strike: 256°   dip: 64°   rake: 58°
Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 5.7   misfit: 0.00   stationDistributionRatio: 0.51   meanDistP: 45.0   meanDistT: 44.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1734795054861.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 147°   dip: 39°   rake: 156°
Nodal Plane 2: strike: 256°   dip: 75°   rake: 53°
Quality: azimuthalGap: 47°   stationPolarityCount: 88   misfit: 0.28   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 12.67   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1734795054861.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1734795054861
Event info last updated: 2024.12.21-16:29:01 UTC
Event first association/location: 2024.12.21-15:35:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA