Early-est:     Kuril Islands    2026.06.27-02:42:01.24    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782528121388.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782528121388.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782528121388.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: 5.0* [49]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2026.06.27-02:42:01.24 UTC
Hypocenter: lat: 49.61°  lon: 156.25°  [+/-26km]    depth: 15km  [+/-37km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 79   usedPhases: 60
minDist: 11.8°   maxDist: 145.3°   AzGap: 87°   2ndAzGap: 128°   atten: -1.08 [+/-0.45]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 17km   maxHorUnc: 26km   azMaxHorUnc: 140°
68%ConfEllipsoid:   semiMajorAxisLength: 39km   majorAxisAzimuth: 313°   majorAxisPlunge: 63°   semiIntermediateAxisLength: 30km   intermediateAxisAzimuth: 145°   intermediateAxisPlunge: 27°   semiMinorAxisLength: 21km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [32]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.7s [29]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~110km
   North America / Pacific [subduction zone]: distance: ~820km
   Okhotsk / North America [subduction zone]: distance: ~820km
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:
       15km
       15km
       15km
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.1782528121388.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 178°   dip: 68°   rake: -160°
Nodal Plane 2: strike: 81°   dip: 71°   rake: -23°
Quality: azimuthalGap: -1°   stationPolarityCount: 47   misfitWeightCount: 4.3   misfit: 0.12   stationDistributionRatio: 0.23   meanDistP: 56.2   meanDistT: 56.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782528121388.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.1782528121388.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 275°   dip: 68°   rake: -101°
Nodal Plane 2: strike: 123°   dip: 25°   rake: -64°
Quality: azimuthalGap: 133°   stationPolarityCount: 47   misfit: 0.33   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 48.22   fracAcc30degPref: 0.45   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782528121388.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782528121388
Event info last updated: 2026.06.27-03:41:01 UTC
Event first association/location: 2026.06.27-02:55:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA