Early-est:     East of Kuril Islands    2025.08.23-01:57:36.96    q:C      mb:4.5*    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: 4.5* [14]    Mwp: - [0]    Mwpd: - [0] Region: East of Kuril Islands Origin Time: 2025.08.23-01:57:36.96 UTC Hypocenter: lat: 49.91°  lon: 157.38°  [+/-14km]    depth: 21km  [+/-15km] Location Quality: qualityCode:  C     stdErr: 0.8s   assocPhases: 30   usedPhases: 16 minDist: 3.2°   maxDist: 75.5°   AzGap: 145°   2ndAzGap: 167°   atten: -1.21 [+/-0.52] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 161° 68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 340°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 249°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4X [2]    Td: -s [0]    Td*T50Ex: - [0]    To: 10.2Xs [2] 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:        21km        21km        21km 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: 97°   dip: 24°   rake: -55° Nodal Plane 2: strike: 239°   dip: 70°   rake: -105° Quality: azimuthalGap: -1°   stationPolarityCount: 15   misfitWeightCount: 4.0   misfit: 0.04   stationDistributionRatio: 0.32   meanDistP: 51.4   meanDistT: 50.8   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: 81°   dip: 23°   rake: -45° Nodal Plane 2: strike: 214°   dip: 74°   rake: -107° Quality: azimuthalGap: 145°   stationPolarityCount: 15   misfit: 0.27   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 35.86   fracAcc30degPref: 0.53   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1755914256111
Event info last updated: 2025.08.23-02:56:01 UTC
Event first association/location: 2025.08.23-02:11:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA