Early-est:     East of Kuril Islands    2025.08.02-19:07:09.54    q:B      mb:4.9*    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: 4.9* [20]    Mwp: - [0]    Mwpd: - [0] Region: East of Kuril Islands Origin Time: 2025.08.02-19:07:09.54 UTC Hypocenter: lat: 50.48°  lon: 158.88°  [+/-14km]    depth: 12km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 74   usedPhases: 29 minDist: 2.5°   maxDist: 157.3°   AzGap: 101°   2ndAzGap: 112°   atten: -1.17 [+/-0.57] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 14km   azMaxHorUnc: 123° 68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 123°   majorAxisPlunge: 3°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 25°   intermediateAxisPlunge: 67°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [22]    Td: 0.9Xs [3]    Td*T50Ex: - [0]    To: 20.1s [17] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~40km    North America / Pacific [subduction zone]: distance: ~630km    Okhotsk / North America [subduction zone]: distance: ~630km 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 (40km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        12km        12km        12km 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: 67°   dip: 31°   rake: 104° Nodal Plane 2: strike: 232°   dip: 60°   rake: 82° Quality: azimuthalGap: -1°   stationPolarityCount: 23   misfitWeightCount: 5.1   misfit: 0.08   stationDistributionRatio: 0.54   meanDistP: 49.4   meanDistT: 48.9   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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 95°   dip: 21°   rake: 101° Nodal Plane 2: strike: 263°   dip: 69°   rake: 86° Quality: azimuthalGap: 147°   stationPolarityCount: 23   misfit: 0.25   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 35.68   fracAcc30degPref: 0.53   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754161630967
Event info last updated: 2025.08.02-20:06:00 UTC
Event first association/location: 2025.08.02-19:14:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA