Early-est:     Off East Coast of Kamchatka    2025.12.08-01:32:21.87    q:B      mb:5.2    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.2 [82]    Mwp: 5.0X [1]    Mwpd: - [0] Region: Off East Coast of Kamchatka Origin Time: 2025.12.08-01:32:21.87 UTC Hypocenter: lat: 51.52°  lon: 159.20°  [+/-18km]    depth: 13km  [+/-23km] Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 151   usedPhases: 103 minDist: 1.5°   maxDist: 148.4°   AzGap: 87°   2ndAzGap: 109°   atten: -0.69 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 128° 68%ConfEllipsoid:   semiMajorAxisLength: 26km   majorAxisAzimuth: 124°   majorAxisPlunge: 49°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 321°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [71]    Td: 0.6Xs [1]    Td*T50Ex: - [0]    To: 2.1s [66] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~90km    North America / Pacific [subduction zone]: distance: ~520km    Okhotsk / North America [subduction zone]: distance: ~520km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 28km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (90km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        13km        13km        13km Slab depth at epicenter:        28km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 49°   dip: 27°   rake: -129° Nodal Plane 2: strike: 271°   dip: 69°   rake: -72° Quality: azimuthalGap: -1°   stationPolarityCount: 84   misfitWeightCount: 10.8   misfit: 0.16   stationDistributionRatio: 0.44   meanDistP: 36.1   meanDistT: 27.0   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH): Nodal Plane 1: strike: 193°   dip: 86°   rake: 172° Nodal Plane 2: strike: 283°   dip: 82°   rake: 4° Quality: azimuthalGap: 109°   stationPolarityCount: 84   misfit: 0.39   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 18.87   fracAcc30degPref: 0.99   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/_amp_mwp

Event ID: smi:KOERI/ee/event/1765157544797
Event info last updated: 2025.12.08-02:32:38 UTC
Event first association/location: 2025.12.08-01:38:38 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI