Early-est:     North Island, New Zealand    2026.08.16-12:45:17.87    q:B      mb:-    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786884318304.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786884318304.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786884318304.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: 5.0X [3]    Mwp: - [0]    Mwpd: - [0]
Region: North Island, New Zealand
Origin Time: 2026.08.16-12:45:17.87 UTC
Hypocenter: lat: -38.76°  lon: 175.11°  [+/-18km]    depth: 218km  [+/-23km]
Location Quality: qualityCode:  B     stdErr: 1.9s   assocPhases: 12   usedPhases: 9
minDist: 0.3°   maxDist: 21.2°   AzGap: 103°   2ndAzGap: 148°   atten: -9.90 [+/-0.00]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 99°
68%ConfEllipsoid:   semiMajorAxisLength: 26km   majorAxisAzimuth: 99°   majorAxisPlunge: 48°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 282°   intermediateAxisPlunge: 42°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.0X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.9Xs [3]
Closest plate boundaries:
   Kermadec - Australia [continental transform fault]: distance: ~70km
   Kermadec / Pacific [subduction zone]: distance: ~350km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (350km)
 no
 YES (70km)
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       218km
       218km
       218km
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.1786884318304.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 135°   dip: 18°   rake: -79°
Nodal Plane 2: strike: 304°   dip: 73°   rake: -93°
Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 6.8   misfit: 0.00   stationDistributionRatio: 0.36   meanDistP: 46.0   meanDistT: 40.0   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786884318304.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.1786884318304.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 312°   dip: 63°   rake: -106°
Nodal Plane 2: strike: 164°   dip: 32°   rake: -62°
Quality: azimuthalGap: 130°   stationPolarityCount: 8   misfit: 0.33   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 42.85   fracAcc30degPref: 0.37   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786884318304.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786884318304
Event info last updated: 2026.08.16-13:44:00 UTC
Event first association/location: 2026.08.16-12:47:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA