Early-est:     Northern Xinjiang, China    2025.12.12-03:05:23.09    q:B      mb:4.5    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765508723016.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765508723016.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765508723016.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765508723016.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: 4.5 [11]    Mwp: - [0]    Mwpd: - [0]
Region: Northern Xinjiang, China
Origin Time: 2025.12.12-03:05:23.09 UTC
Hypocenter: lat: 43.52°  lon: 86.22°  [+/-16km]    depth: 93km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 33   usedPhases: 21
minDist: 4.1°   maxDist: 52.7°   AzGap: 94°   2ndAzGap: 181°   atten: -0.99 [+/-0.37]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 72°
68%ConfEllipsoid:   semiMajorAxisLength: 20km   majorAxisAzimuth: 254°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 350°   intermediateAxisPlunge: 26°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.5 [8]    Td: 0.1Xs [1]    Td*T50Ex: - [0]    To: 1.5Xs [2]
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:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       93km
       93km
       93km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1765508723016.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 327°   dip: 54°   rake: 170°
Nodal Plane 2: strike: 63°   dip: 82°   rake: 36°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 5.7   misfit: 0.06   stationDistributionRatio: 0.27   meanDistP: 48.6   meanDistT: 46.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765508723016.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 326°   dip: 84°   rake: -136°
Nodal Plane 2: strike: 230°   dip: 47°   rake: -8°
Quality: azimuthalGap: 130°   stationPolarityCount: 17   misfit: 0.34   stationDistributionRatio: 0.42   rmsAngDiffAccPref: 44.18   fracAcc30degPref: 0.48   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765508723016.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.1765508723016.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.1765508723016.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765508723016
Event info last updated: 2025.12.12-04:05:01 UTC
Event first association/location: 2025.12.12-03:13:07 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI