Early-est:     Central Alaska    2025.01.30-04:40:13.87    q:A      mb:5.2    Mwp:-    Mwpd:-    Td*T50Ex:1.0     fmamp_polarity:./hypo.1738212012584.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738212012584.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738212012584.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738212012584.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: 5.2 [121]    Mwp: 5.0X [1]    Mwpd: - [0]
Region: Central Alaska
Origin Time: 2025.01.30-04:40:13.87 UTC
Hypocenter: lat: 62.99°  lon: -156.01°  [+/-16km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 166   usedPhases: 133
minDist: 3.5°   maxDist: 149.3°   AzGap: 38°   2ndAzGap: 59°   atten: -1.09 [+/-0.13]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 16km   azMaxHorUnc: 21°
68%ConfEllipsoid:   semiMajorAxisLength: 20km   majorAxisAzimuth: 202°   majorAxisPlunge: 8°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 293°   intermediateAxisPlunge: 10°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.6 [87]    Td: 1.7s [5]    Td*T50Ex: 1.0 [5]    To: 5.5s [76]
Closest plate boundaries:
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   1.0
   1.0
   1.0
Td*To:
     9.3
     9.3
     9.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1738212012584.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 65°   dip: 69°   rake: 167°
Nodal Plane 2: strike: 160°   dip: 78°   rake: 21°
Quality: azimuthalGap: -1°   stationPolarityCount: 119   misfitWeightCount: 17.3   misfit: 0.28   stationDistributionRatio: 0.42   meanDistP: 44.7   meanDistT: 37.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738212012584.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 8°   dip: 78°   rake: 91°
Nodal Plane 2: strike: 183°   dip: 12°   rake: 86°
Quality: azimuthalGap: 38°   stationPolarityCount: 119   misfit: 0.32   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 44.65   fracAcc30degPref: 0.43   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738212012584.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 185°   dip: 46°   rake: -174°
Nodal Plane 2: strike: 91°   dip: 86°   rake: -44°
Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 3.6   misfit: 9999.90   stationDistributionRatio: 0.22   meanDistP: 31.0   meanDistT: 46.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
./hypo.1738212012584.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.1738212012584.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738212012584
Event info last updated: 2025.01.30-05:41:05 UTC
Event first association/location: 2025.01.30-04:46:04 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI