Early-est:     Off East Coast of Kamchatka    2025.12.07-16:41:26.19    q:B      mb:5.0    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: 5.0 [61]    Mwp: 4.8X [1]    Mwpd: - [0] Region: Off East Coast of Kamchatka Origin Time: 2025.12.07-16:41:26.19 UTC Hypocenter: lat: 52.22°  lon: 160.10°  [+/-14km]    depth: 32km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 124   usedPhases: 71 minDist: 1.2°   maxDist: 145.3°   AzGap: 131°   2ndAzGap: 150°   atten: -1.02 [+/-0.25] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 28° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 31°   majorAxisPlunge: 56°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 205°   intermediateAxisPlunge: 33°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [40]    Td: -s [0]    Td*T50Ex: - [0]    To: 3.0s [32] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~60km    North America / Pacific [subduction zone]: distance: ~420km    Okhotsk / North America [subduction zone]: distance: ~420km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 25km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (60km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        32km        32km        32km Slab depth at epicenter:        25km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 165°   dip: 63°   rake: -169° Nodal Plane 2: strike: 70°   dip: 80°   rake: -28° Quality: azimuthalGap: -1°   stationPolarityCount: 65   misfitWeightCount: 9.2   misfit: 0.16   stationDistributionRatio: 0.37   meanDistP: 43.3   meanDistT: 45.2   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 352°   dip: 34°   rake: -138° Nodal Plane 2: strike: 226°   dip: 68°   rake: -63° Quality: azimuthalGap: 130°   stationPolarityCount: 65   misfit: 0.34   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 36.65   fracAcc30degPref: 0.57   qualityCode: D 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/1765125681466
Event info last updated: 2025.12.07-17:42:06 UTC
Event first association/location: 2025.12.07-16:52:19 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI