Early-est:     Kermadec Islands Region    2026.08.13-16:11:41.53    q:B      mb:5.1*    Mwp:6.2    Mwpd:-    Td*T50Ex:4.7     fmamp_polarity:./hypo.1786637502649.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786637502649.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786637502649.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: 5.1* [29]    Mwp: 6.2 [6]    Mwpd: 6.5Xinv [5]
Region: Kermadec Islands Region
Origin Time: 2026.08.13-16:11:41.53 UTC
Hypocenter: lat: -29.25°  lon: -175.26°  [+/-10km]    depth: 9km  [+/-11km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 69   usedPhases: 33
minDist: 2.3°   maxDist: 161.9°   AzGap: 181°   2ndAzGap: 195°   atten: -1.38 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 10km   azMaxHorUnc: 103°
68%ConfEllipsoid:   semiMajorAxisLength: 14km   majorAxisAzimuth: 283°   majorAxisPlunge: 29°   semiIntermediateAxisLength: 10km   intermediateAxisAzimuth: 109°   intermediateAxisPlunge: 61°   semiMinorAxisLength: 8km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [25]    Td: 8.6s [6]    Td*T50Ex: 4.7 [6]    To: 27.1s [21]
Closest plate boundaries:
   Kermadec / Pacific [subduction zone]: distance: ~80km
Subduction geometry: none or not available
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:
   4.7
   4.7
   4.7
Td*To:
     233.1
     233.1
     233.1
Mwp magnitude:
       6.2
       6.2
       6.2
Hypocenter depth:
       9km
       9km
       9km
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.1786637502649.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 141°   dip: 56°   rake: -150°
Nodal Plane 2: strike: 34°   dip: 66°   rake: -38°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 7.9   misfit: 0.08   stationDistributionRatio: 0.42   meanDistP: 34.9   meanDistT: 45.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786637502649.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.1786637502649.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: 180°   stationPolarityCount: 29   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786637502649.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786637502649
Event info last updated: 2026.08.13-17:10:01 UTC
Event first association/location: 2026.08.13-16:16:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA