Early-est:     Kermadec Islands Region    2026.06.21-23:14:35.41    q:C      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782083678447.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782083678447.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782083678447.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: 4.9* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Kermadec Islands Region
Origin Time: 2026.06.21-23:14:35.41 UTC
Hypocenter: lat: -30.77°  lon: -176.56°  [+/-49km]    depth: 90km  [+/-29km]
Location Quality: qualityCode:  C     stdErr: 1.9s   assocPhases: 57   usedPhases: 31
minDist: 1.9°   maxDist: 166.4°   AzGap: 111°   2ndAzGap: 215°   atten: -1.34 [+/-0.43]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 49km   azMaxHorUnc: 91°
68%ConfEllipsoid:   semiMajorAxisLength: 61km   majorAxisAzimuth: 91°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 252°   intermediateAxisPlunge: 78°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.2 [14]    Td: -s [0]    Td*T50Ex: - [0]    To: 5.1s [13]
Closest plate boundaries:
   Kermadec / Pacific [subduction zone]: distance: ~20km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (20km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       90km
       90km
       90km
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.1782083678447.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 28°   dip: 65°   rake: -3°
Nodal Plane 2: strike: 119°   dip: 88°   rake: -155°
Quality: azimuthalGap: -1°   stationPolarityCount: 21   misfitWeightCount: 9.2   misfit: 0.08   stationDistributionRatio: 0.62   meanDistP: 40.9   meanDistT: 37.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782083678447.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.1782083678447.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 289°   dip: 34°   rake: -156°
Nodal Plane 2: strike: 179°   dip: 77°   rake: -58°
Quality: azimuthalGap: 126°   stationPolarityCount: 21   misfit: 0.27   stationDistributionRatio: 0.48   rmsAngDiffAccPref: 33.30   fracAcc30degPref: 0.64   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782083678447.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782083678447
Event info last updated: 2026.06.22-00:13:04 UTC
Event first association/location: 2026.06.21-23:23:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA