Early-est:     Kuril Islands    2026.02.13-02:16:51.42    q:C      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770949007628.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770949007628.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770949007628.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* [26]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2026.02.13-02:16:51.42 UTC
Hypocenter: lat: 44.66°  lon: 148.82°  [+/-70km]    depth: 59km  [+/-41km]
Location Quality: qualityCode:  C     stdErr: 1.6s   assocPhases: 71   usedPhases: 32
minDist: 4.8°   maxDist: 152.9°   AzGap: 89°   2ndAzGap: 99°   atten: -1.37 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 30km   maxHorUnc: 70km   azMaxHorUnc: 178°
68%ConfEllipsoid:   semiMajorAxisLength: 89km   majorAxisAzimuth: 357°   majorAxisPlunge: 13°   semiIntermediateAxisLength: 40km   intermediateAxisAzimuth: 257°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 34km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [27]    Td: -s [0]    Td*T50Ex: - [0]    To: 24.0s [25]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~110km
   Pacific \ Okhotsk [subduction zone]: distance: ~550km
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:
       59km
       59km
       59km
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.1770949007628.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 56°   dip: 7°   rake: -122°
Nodal Plane 2: strike: 269°   dip: 84°   rake: -86°
Quality: azimuthalGap: -1°   stationPolarityCount: 27   misfitWeightCount: 4.1   misfit: 0.11   stationDistributionRatio: 0.38   meanDistP: 52.7   meanDistT: 45.7   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770949007628.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.1770949007628.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 204°   dip: 30°   rake: -30°
Nodal Plane 2: strike: 321°   dip: 76°   rake: -117°
Quality: azimuthalGap: 131°   stationPolarityCount: 27   misfit: 0.27   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 37.15   fracAcc30degPref: 0.53   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770949007628.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770949007628
Event info last updated: 2026.02.13-03:15:01 UTC
Event first association/location: 2026.02.13-02:26:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA