Early-est:     Kuril Islands    2026.02.14-21:07:55.37    q:C      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1771103277923.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1771103277923.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1771103277923.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: 4.7* [21]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2026.02.14-21:07:55.37 UTC
Hypocenter: lat: 49.32°  lon: 154.93°  [+/-24km]    depth: 23km  [+/-60km]
Location Quality: qualityCode:  C     stdErr: 2.4s   assocPhases: 46   usedPhases: 25
minDist: 4.4°   maxDist: 154.4°   AzGap: 72°   2ndAzGap: 136°   atten: -1.11 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 24km   azMaxHorUnc: 134°
68%ConfEllipsoid:   semiMajorAxisLength: 61km   majorAxisAzimuth: 195°   majorAxisPlunge: 81°   semiIntermediateAxisLength: 29km   intermediateAxisAzimuth: 309°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 21km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [7]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~160km
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 (160km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       23km
       23km
       23km
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.1771103277923.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 264°   dip: 55°   rake: -157°
Nodal Plane 2: strike: 160°   dip: 71°   rake: -38°
Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 5.3   misfit: 0.06   stationDistributionRatio: 0.43   meanDistP: 52.6   meanDistT: 53.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1771103277923.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.1771103277923.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 160°   stationPolarityCount: 20   misfit: 0.99   stationDistributionRatio: 0.44   rmsAngDiffAccPref: 40.68   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1771103277923.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1771103277923
Event info last updated: 2026.02.14-22:06:01 UTC
Event first association/location: 2026.02.14-21:13:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA