Early-est:     East of Kuril Islands    2025.08.03-20:08:51.37    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* [61]    Mwp: - [0]    Mwpd: - [0] Region: East of Kuril Islands Origin Time: 2025.08.03-20:08:51.37 UTC Hypocenter: lat: 49.94°  lon: 157.34°  [+/-21km]    depth: 30km  [+/-24km] Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 94   usedPhases: 71 minDist: 3.2°   maxDist: 145.7°   AzGap: 109°   2ndAzGap: 136°   atten: -1.04 [+/-0.24] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 21km   maxHorUnc: 21km   azMaxHorUnc: 120° 68%ConfEllipsoid:   semiMajorAxisLength: 27km   majorAxisAzimuth: 294°   majorAxisPlunge: 9°   semiIntermediateAxisLength: 26km   intermediateAxisAzimuth: 202°   intermediateAxisPlunge: 13°   semiMinorAxisLength: 24km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [46]    Td: 2.7Xs [3]    Td*T50Ex: - [0]    To: 2.8s [40] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~70km    North America / Pacific [subduction zone]: distance: ~740km    Okhotsk / North America [subduction zone]: distance: ~740km 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 (70km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        30km        30km        30km 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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 168°   dip: 23°   rake: -145° Nodal Plane 2: strike: 45°   dip: 77°   rake: -71° Quality: azimuthalGap: -1°   stationPolarityCount: 63   misfitWeightCount: 8.4   misfit: 0.08   stationDistributionRatio: 0.60   meanDistP: 30.7   meanDistT: 46.6   qualityCode: C 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): Nodal Plane 1: strike: 213°   dip: 76°   rake: 158° Nodal Plane 2: strike: 309°   dip: 69°   rake: 15° Quality: azimuthalGap: 136°   stationPolarityCount: 63   misfit: 0.32   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 9.37   fracAcc30degPref: 1.00   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754251731679
Event info last updated: 2025.08.03-21:07:02 UTC
Event first association/location: 2025.08.03-20:16:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA