Early-est:     Off East Coast of Kamchatka    2026.06.20-03:49:04.42    q:A      mb:5.2    Mwp:6.1*    Mwpd:-    Td*T50Ex:2.1     fmamp_polarity:./hypo.1781927342954.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781927342954.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781927342954.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 [115]    Mwp: 6.1* [90]    Mwpd: 6.2Xinv [81]
Region: Off East Coast of Kamchatka
Origin Time: 2026.06.20-03:49:04.42 UTC
Hypocenter: lat: 52.64°  lon: 160.72°  [+/-15km]    depth: 5km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 193   usedPhases: 111
minDist: 15.2°   maxDist: 145.5°   AzGap: 80°   2ndAzGap: 108°   atten: -0.95 [+/-0.33]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 161°
68%ConfEllipsoid:   semiMajorAxisLength: 20km   majorAxisAzimuth: 156°   majorAxisPlunge: 33°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 41°   intermediateAxisPlunge: 33°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [88]    Td: 3.6s [12]    Td*T50Ex: 2.1 [12]    To: 32.0s [87]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~60km
   North America / Pacific [subduction zone]: distance: ~360km
   Okhotsk / North America [subduction zone]: distance: ~360km
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 (60km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   2.1
   2.1
   2.1
Td*To:
     115.2
     115.2
     115.2
Mwp magnitude:
       6.1*
       6.1*
       6.1*
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.1781927342954.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 175°   dip: 26°   rake: 70°
Nodal Plane 2: strike: 17°   dip: 65°   rake: 99°
Quality: azimuthalGap: -1°   stationPolarityCount: 104   misfitWeightCount: 8.7   misfit: 0.02   stationDistributionRatio: 0.65   meanDistP: 46.5   meanDistT: 34.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781927342954.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 158°   dip: 30°   rake: 57°
Nodal Plane 2: strike: 16°   dip: 65°   rake: 108°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 3.4   misfit: 0.00   stationDistributionRatio: 0.58   meanDistP: 50.0   meanDistT: 43.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1781927342954.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 253°   dip: 39°   rake: 109°
Nodal Plane 2: strike: 49°   dip: 54°   rake: 75°
Quality: azimuthalGap: 126°   stationPolarityCount: 104   misfit: 0.07   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 42.48   fracAcc30degPref: 0.39   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781927342954.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781927342954
Event info last updated: 2026.06.20-04:48:03 UTC
Event first association/location: 2026.06.20-03:57:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA