Early-est:     Off East Coast of Kamchatka    2025.12.16-09:30:44.62    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 [24]    Mwp: - [0]    Mwpd: - [0] Region: Off East Coast of Kamchatka Origin Time: 2025.12.16-09:30:44.62 UTC Hypocenter: lat: 51.31°  lon: 159.42°  [+/-15km]    depth: 10km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 55   usedPhases: 30 minDist: 1.8°   maxDist: 117.3°   AzGap: 138°   2ndAzGap: 184°   atten: -1.01 [+/-0.38] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 1° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 4°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 96°   intermediateAxisPlunge: 9°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3 [12]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [10] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~60km    North America / Pacific [subduction zone]: distance: ~530km    Okhotsk / North America [subduction zone]: distance: ~530km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 20km 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:        10km        10km        10km Slab depth at epicenter:        20km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 82°   dip: 37°   rake: -75° Nodal Plane 2: strike: 244°   dip: 54°   rake: -101° Quality: azimuthalGap: -1°   stationPolarityCount: 29   misfitWeightCount: 4.8   misfit: 0.10   stationDistributionRatio: 0.53   meanDistP: 37.4   meanDistT: 41.0   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: 42°   dip: 50°   rake: -145° Nodal Plane 2: strike: 288°   dip: 64°   rake: -46° Quality: azimuthalGap: 137°   stationPolarityCount: 29   misfit: 0.26   stationDistributionRatio: 0.70   rmsAngDiffAccPref: 39.41   fracAcc30degPref: 0.51   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: 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/1765877445171
Event info last updated: 2025.12.16-10:30:49 UTC
Event first association/location: 2025.12.16-09:40:37 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI