Early-est:     Off East Coast of Kamchatka    2026.06.19-07:53:01.77    q:B      mb:5.4*    Mwp:-    Mwpd:-    Td*T50Ex:1.6     fmamp_polarity:./hypo.1781855580274.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781855580274.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781855580274.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: 5.4* [133]    Mwp: 6.1X [2]    Mwpd: 6.2Xinv [2]
Region: Off East Coast of Kamchatka
Origin Time: 2026.06.19-07:53:01.77 UTC
Hypocenter: lat: 52.73°  lon: 160.90°  [+/-17km]    depth: 21km  [+/-31km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 188   usedPhases: 149
minDist: 15.1°   maxDist: 145.4°   AzGap: 77°   2ndAzGap: 94°   atten: -0.59 [+/-0.27]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 17km   azMaxHorUnc: 9°
68%ConfEllipsoid:   semiMajorAxisLength: 32km   majorAxisAzimuth: 196°   majorAxisPlunge: 70°   semiIntermediateAxisLength: 20km   intermediateAxisAzimuth: 6°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [128]    Td: 3.6s [4]    Td*T50Ex: 1.6 [4]    To: 4.0s [125]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~50km
   North America / Pacific [subduction zone]: distance: ~340km
   Okhotsk / North America [subduction zone]: distance: ~340km
Subduction geometry:    Zone: Kamchatka/Kurils/Japan: 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 (50km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.6
   1.6
   1.6
Td*To:
     14.4
     14.4
     14.4
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       21km
       21km
       21km
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.1781855580274.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 137°   dip: 41°   rake: 71°
Nodal Plane 2: strike: 341°   dip: 52°   rake: 106°
Quality: azimuthalGap: -1°   stationPolarityCount: 117   misfitWeightCount: 12.1   misfit: 0.10   stationDistributionRatio: 0.46   meanDistP: 46.7   meanDistT: 34.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781855580274.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.1781855580274.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 200°   dip: 37°   rake: 100°
Nodal Plane 2: strike: 7°   dip: 53°   rake: 82°
Quality: azimuthalGap: 76°   stationPolarityCount: 119   misfit: 0.15   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 37.87   fracAcc30degPref: 0.52   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781855580274.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781855580274
Event info last updated: 2026.06.19-08:52:01 UTC
Event first association/location: 2026.06.19-08:00:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA