Early-est:     Kuril Islands    2025.08.01-19:56:29.65    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754078189024.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754078189024.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754078189024.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: 4.9* [55]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2025.08.01-19:56:29.65 UTC
Hypocenter: lat: 48.99°  lon: 155.39°  [+/-14km]    depth: 5km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.9s   assocPhases: 109   usedPhases: 69
minDist: 4.5°   maxDist: 155.2°   AzGap: 103°   2ndAzGap: 116°   atten: -0.85 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 28°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 241°   majorAxisPlunge: 42°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 341°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [34]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.5s [34]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~110km
   North America / Pacific [subduction zone]: distance: ~910km
   Okhotsk / North America [subduction zone]: distance: ~910km
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 (110km)
 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)
./hypo.1754078189024.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 43°   dip: 13°   rake: 17°
Nodal Plane 2: strike: 297°   dip: 86°   rake: 103°
Quality: azimuthalGap: -1°   stationPolarityCount: 54   misfitWeightCount: 7.4   misfit: 0.14   stationDistributionRatio: 0.40   meanDistP: 36.7   meanDistT: 46.1   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754078189024.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.1754078189024.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 344°   dip: 5°   rake: -48°
Nodal Plane 2: strike: 122°   dip: 86°   rake: -93°
Quality: azimuthalGap: 145°   stationPolarityCount: 54   misfit: 0.36   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 34.14   fracAcc30degPref: 0.54   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754078189024.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754078189024
Event info last updated: 2025.08.01-20:55:02 UTC
Event first association/location: 2025.08.01-20:08:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA