Early-est:     Sea of Okhotsk    2025.01.28-06:20:30.08    q:B      mb:4.8    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1738045229706.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738045229706.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738045229706.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738045229706.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.8 [21]    Mwp: - [0]    Mwpd: - [0]
Region: Sea of Okhotsk
Origin Time: 2025.01.28-06:20:30.08 UTC
Hypocenter: lat: 46.71°  lon: 145.05°  [+/-15km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 55   usedPhases: 25
minDist: 1.6°   maxDist: 155.3°   AzGap: 82°   2ndAzGap: 159°   atten: -0.81 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 129°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 129°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 38°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [11]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.4s [8]
Closest plate boundaries:
Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 324km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       324km
       -
       -
./hypo.1738045229706.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 42°   dip: 9°   rake: -147°
Nodal Plane 2: strike: 279°   dip: 85°   rake: -82°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 4.5   misfit: 0.11   stationDistributionRatio: 0.59   meanDistP: 42.1   meanDistT: 31.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738045229706.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 16°   dip: 32°   rake: -158°
Nodal Plane 2: strike: 267°   dip: 79°   rake: -60°
Quality: azimuthalGap: 82°   stationPolarityCount: 25   misfit: 0.21   stationDistributionRatio: 0.55   rmsAngDiffAccPref: 33.06   fracAcc30degPref: 0.61   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738045229706.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
./hypo.1738045229706.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp
./hypo.1738045229706.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738045229706
Event info last updated: 2025.01.28-07:20:48 UTC
Event first association/location: 2025.01.28-06:28:37 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI