Early-est:     East of Kuril Islands    2025.08.06-05:01:29.16    q:B      mb:5.2*    Mwp:5.3    Mwpd:-    Td*T50Ex:0.8     fmamp_polarity:./hypo.1754456488644.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754456488644.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754456488644.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* [98]    Mwp: 5.3 [7]    Mwpd: 5.5Xinv [5]
Region: East of Kuril Islands
Origin Time: 2025.08.06-05:01:29.16 UTC
Hypocenter: lat: 49.97°  lon: 158.69°  [+/-27km]    depth: 5km  [+/-27km]
Location Quality: qualityCode:  B     stdErr: 2.4s   assocPhases: 144   usedPhases: 105
minDist: 3.1°   maxDist: 156.7°   AzGap: 70°   2ndAzGap: 78°   atten: -0.81 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 27km   azMaxHorUnc: 149°
68%ConfEllipsoid:   semiMajorAxisLength: 33km   majorAxisAzimuth: 328°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 29km   intermediateAxisAzimuth: 237°   intermediateAxisPlunge: 61°   semiMinorAxisLength: 19km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [84]    Td: 1.8s [14]    Td*T50Ex: 0.8 [14]    To: 25.9s [82]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~10km
   North America / Pacific [subduction zone]: distance: ~690km
   Okhotsk / North America [subduction zone]: distance: ~690km
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 (10km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.8
   0.8
   0.8
Td*To:
     46.6
     46.6
     46.6
Mwp magnitude:
       5.3
       5.3
       5.3
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)
./hypo.1754456488644.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 37°   dip: 35°   rake: 160°
Nodal Plane 2: strike: 143°   dip: 79°   rake: 57°
Quality: azimuthalGap: -1°   stationPolarityCount: 83   misfitWeightCount: 10.3   misfit: 0.27   stationDistributionRatio: 0.32   meanDistP: 53.9   meanDistT: 52.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754456488644.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.1754456488644.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 359°   dip: 74°   rake: -176°
Nodal Plane 2: strike: 268°   dip: 86°   rake: -16°
Quality: azimuthalGap: 100°   stationPolarityCount: 82   misfit: 0.39   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 39.14   fracAcc30degPref: 0.60   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754456488644.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754456488644
Event info last updated: 2025.08.06-06:00:01 UTC
Event first association/location: 2025.08.06-05:07:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA