Early-est:     Off East Coast of Kamchatka    2025.12.15-08:11:19.47    q:A      mb:5.2    Mwp:5.8    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 [77]    Mwp: 5.8 [6]    Mwpd: 6.0Xinv [3] Region: Off East Coast of Kamchatka Origin Time: 2025.12.15-08:11:19.47 UTC Hypocenter: lat: 51.86°  lon: 160.15°  [+/-15km]    depth: 10km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 129   usedPhases: 93 minDist: 1.5°   maxDist: 145.7°   AzGap: 103°   2ndAzGap: 111°   atten: -0.97 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 11° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 191°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 282°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [74]    Td: 1.3Xs [2]    Td*T50Ex: - [0]    To: 31.8s [65] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~50km    North America / Pacific [subduction zone]: distance: ~450km    Okhotsk / North America [subduction zone]: distance: ~450km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 18km 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:    -    -    - Td*To:      -      -      - Mwp magnitude:        5.8        5.8        5.8 Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        18km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 130°   dip: 25°   rake: 33° Nodal Plane 2: strike: 9°   dip: 77°   rake: 111° Quality: azimuthalGap: -1°   stationPolarityCount: 86   misfitWeightCount: 9.5   misfit: 0.15   stationDistributionRatio: 0.45   meanDistP: 31.4   meanDistT: 25.5   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 246°   dip: 72°   rake: 163° Nodal Plane 2: strike: 342°   dip: 74°   rake: 19° Quality: azimuthalGap: 104°   stationPolarityCount: 86   misfit: 0.31   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 22.49   fracAcc30degPref: 0.90   qualityCode: C 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: 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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1765786279029
Event info last updated: 2025.12.15-09:11:50 UTC
Event first association/location: 2025.12.15-08:18:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI