Early-est:     Off East Coast of Kamchatka    2026.08.17-12:38:00.54    q:C      mb:5.2    Mwp:5.9*    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

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

Earthquake Details: Magnitude: mb: 5.2 [56]    Mwp: 5.9* [24]    Mwpd: 6.0Xinv [24] Region: Off East Coast of Kamchatka Origin Time: 2026.08.17-12:38:00.54 UTC Hypocenter: lat: 52.76°  lon: 159.78°  [+/-35km]    depth: 15km  [+/-33km] Location Quality: qualityCode:  C     stdErr: 1.3s   assocPhases: 85   usedPhases: 57 minDist: 15.5°   maxDist: 139.3°   AzGap: 116°   2ndAzGap: 119°   atten: -0.53 [+/-0.29] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 35km   azMaxHorUnc: 165° 68%ConfEllipsoid:   semiMajorAxisLength: 43km   majorAxisAzimuth: 165°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 34km   intermediateAxisAzimuth: 257°   intermediateAxisPlunge: 65°   semiMinorAxisLength: 28km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [44]    Td: 3.8Xs [3]    Td*T50Ex: - [0]    To: 29.2s [42] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~100km    North America / Pacific [subduction zone]: distance: ~390km    Okhotsk / North America [subduction zone]: distance: ~390km 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 (100km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        5.9*        5.9*        5.9* Hypocenter depth:        15km        15km        15km 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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 28°   dip: 61°   rake: 147° Nodal Plane 2: strike: 136°   dip: 61°   rake: 34° Quality: azimuthalGap: -1°   stationPolarityCount: 53   misfitWeightCount: 6.8   misfit: 0.23   stationDistributionRatio: 0.30   meanDistP: 55.3   meanDistT: 50.9   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 175°   dip: 25°   rake: 65° Nodal Plane 2: strike: 22°   dip: 68°   rake: 101° Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 1.6   misfit: 0.00   stationDistributionRatio: 0.43   meanDistP: 53.6   meanDistT: 50.1   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 28°   dip: 60°   rake: 143° Nodal Plane 2: strike: 139°   dip: 59°   rake: 36° Quality: azimuthalGap: 115°   stationPolarityCount: 53   misfit: 0.32   stationDistributionRatio: 0.70   rmsAngDiffAccPref: 39.86   fracAcc30degPref: 0.54   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1786970279795
Event info last updated: 2026.08.17-13:36:08 UTC
Event first association/location: 2026.08.17-12:49:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA