Early-est:     Off East Coast of Kamchatka    2025.08.06-10:35:09.52    q:A      mb:5.4    Mwp:6.0*    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1754476511097.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754476511097.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754476511097.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: 5.4 [146]    Mwp: 6.0* [81]    Mwpd: 6.0Xinv [78]
Region: Off East Coast of Kamchatka
Origin Time: 2025.08.06-10:35:09.52 UTC
Hypocenter: lat: 51.52°  lon: 159.48°  [+/-16km]    depth: 9km  [+/-13km]
Location Quality: qualityCode:  A     stdErr: 1.5s   assocPhases: 238   usedPhases: 161
minDist: 1.6°   maxDist: 146.1°   AzGap: 58°   2ndAzGap: 73°   atten: -0.76 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 16km   azMaxHorUnc: 146°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 325°   majorAxisPlunge: 9°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 227°   intermediateAxisPlunge: 42°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [136]    Td: 2.4s [23]    Td*T50Ex: 1.1 [23]    To: 7.2s [133]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~80km
   North America / Pacific [subduction zone]: distance: ~510km
   Okhotsk / North America [subduction zone]: distance: ~510km
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 (80km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     17.3
     17.3
     17.3
Mwp magnitude:
       6.0*
       6.0*
       6.0*
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.1754476511097.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 135°   dip: 46°   rake: 55°
Nodal Plane 2: strike: 1°   dip: 54°   rake: 121°
Quality: azimuthalGap: -1°   stationPolarityCount: 149   misfitWeightCount: 18.5   misfit: 0.07   stationDistributionRatio: 0.60   meanDistP: 30.4   meanDistT: 26.2   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754476511097.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 355°   dip: 43°   rake: 109°
Nodal Plane 2: strike: 150°   dip: 50°   rake: 73°
Quality: azimuthalGap: -1°   stationPolarityCount: 35   misfitWeightCount: 6.1   misfit: 0.00   stationDistributionRatio: 0.41   meanDistP: 43.9   meanDistT: 43.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1754476511097.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 112°   dip: 20°   rake: 20°
Nodal Plane 2: strike: 3°   dip: 84°   rake: 109°
Quality: azimuthalGap: 58°   stationPolarityCount: 148   misfit: 0.12   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 34.06   fracAcc30degPref: 0.55   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754476511097.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754476511097
Event info last updated: 2025.08.06-11:34:02 UTC
Event first association/location: 2025.08.06-10:40:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA