Early-est:     East of Kuril Islands    2025.08.01-11:00:01.15    q:B      mb:5.0*    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: 5.0* [41]    Mwp: - [0]    Mwpd: - [0] Region: East of Kuril Islands Origin Time: 2025.08.01-11:00:01.15 UTC Hypocenter: lat: 50.14°  lon: 159.48°  [+/-13km]    depth: 5km  [+/-16km] Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 67   usedPhases: 48 minDist: 20.1°   maxDist: 148.4°   AzGap: 90°   2ndAzGap: 102°   atten: -1.60 [+/-0.43] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 13km   azMaxHorUnc: 105° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 113°   majorAxisPlunge: 49°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 215°   intermediateAxisPlunge: 10°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [24]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.7s [24] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~20km    North America / Pacific [subduction zone]: distance: ~640km    Okhotsk / North America [subduction zone]: distance: ~640km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (20km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        5km        5km        5km 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: 81°   dip: 29°   rake: -173° Nodal Plane 2: strike: 345°   dip: 87°   rake: -61° Quality: azimuthalGap: -1°   stationPolarityCount: 45   misfitWeightCount: 6.9   misfit: 0.11   stationDistributionRatio: 0.30   meanDistP: 45.8   meanDistT: 45.4   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: 100°   dip: 84°   rake: 168° Nodal Plane 2: strike: 191°   dip: 78°   rake: 6° Quality: azimuthalGap: 125°   stationPolarityCount: 45   misfit: 0.22   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 13.07   fracAcc30degPref: 1.00   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754046000618
Event info last updated: 2025.08.01-11:59:01 UTC
Event first association/location: 2025.08.01-11:13:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA