Early-est:     Kuril Islands    2025.08.06-20:27:18.39    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754512037841.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754512037841.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754512037841.mech.hash.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 5.2* [84]    Mwp: 5.9X [1]    Mwpd: 6.2Xinv [1]
Region: Kuril Islands
Origin Time: 2025.08.06-20:27:18.39 UTC
Hypocenter: lat: 50.03°  lon: 157.42°  [+/-31km]    depth: 9km  [+/-35km]
Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 131   usedPhases: 92
minDist: 10.2°   maxDist: 156.6°   AzGap: 73°   2ndAzGap: 86°   atten: -0.97 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 30km   maxHorUnc: 31km   azMaxHorUnc: 114°
68%ConfEllipsoid:   semiMajorAxisLength: 40km   majorAxisAzimuth: 298°   majorAxisPlunge: 27°   semiIntermediateAxisLength: 37km   intermediateAxisAzimuth: 32°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 34km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [73]    Td: 1.6Xs [3]    Td*T50Ex: - [0]    To: 15.6s [69]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~70km
   North America / Pacific [subduction zone]: distance: ~730km
   Okhotsk / North America [subduction zone]: distance: ~730km
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:
       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)
./hypo.1754512037841.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 105°   dip: 73°   rake: 12°
Nodal Plane 2: strike: 11°   dip: 78°   rake: 163°
Quality: azimuthalGap: -1°   stationPolarityCount: 75   misfitWeightCount: 8.6   misfit: 0.09   stationDistributionRatio: 0.34   meanDistP: 50.8   meanDistT: 41.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754512037841.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1754512037841.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 162°   dip: 84°   rake: -179°
Nodal Plane 2: strike: 72°   dip: 89°   rake: -6°
Quality: azimuthalGap: 99°   stationPolarityCount: 75   misfit: 0.31   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 19.42   fracAcc30degPref: 0.99   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754512037841.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754512037841
Event info last updated: 2025.08.06-21:26:03 UTC
Event first association/location: 2025.08.06-20:33:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA