Early-est:     East of Kuril Islands    2025.08.04-10:26:27.08    q:C      mb:4.7*    Mwp:-    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: 4.7* [21]    Mwp: - [0]    Mwpd: - [0] Region: East of Kuril Islands Origin Time: 2025.08.04-10:26:27.08 UTC Hypocenter: lat: 50.42°  lon: 158.54°  [+/-15km]    depth: 9km  [+/-15km] Location Quality: qualityCode:  C     stdErr: 2.6s   assocPhases: 48   usedPhases: 23 minDist: 2.6°   maxDist: 145.0°   AzGap: 110°   2ndAzGap: 147°   atten: -1.83 [+/-0.56] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 143° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 322°   majorAxisPlunge: 15°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 228°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [14]    Td: 0.7Xs [1]    Td*T50Ex: - [0]    To: 2.9s [9] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~50km    North America / Pacific [subduction zone]: distance: ~650km    Okhotsk / North America [subduction zone]: distance: ~650km 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 (50km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        9km        9km        9km 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: 351°   dip: 24°   rake: 138° Nodal Plane 2: strike: 121°   dip: 74°   rake: 72° Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 4.5   misfit: 0.06   stationDistributionRatio: 0.37   meanDistP: 54.3   meanDistT: 47.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 165°   dip: 45°   rake: 61° Nodal Plane 2: strike: 23°   dip: 52°   rake: 116° Quality: azimuthalGap: 146°   stationPolarityCount: 24   misfit: 0.21   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 43.67   fracAcc30degPref: 0.36   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754303187092
Event info last updated: 2025.08.04-11:25:03 UTC
Event first association/location: 2025.08.04-10:37:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA