Early-est:     Northern Xinjiang, China    2026.04.02-07:39:11.87    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1775115557829.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775115557829.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775115557829.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: 5.0* [33]    Mwp: - [0]    Mwpd: - [0]
Region: Northern Xinjiang, China
Origin Time: 2026.04.02-07:39:11.87 UTC
Hypocenter: lat: 43.42°  lon: 88.33°  [+/-27km]    depth: 9km  [+/-19km]
Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 56   usedPhases: 35
minDist: 5.6°   maxDist: 147.4°   AzGap: 47°   2ndAzGap: 71°   atten: -1.31 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 27km   azMaxHorUnc: 62°
68%ConfEllipsoid:   semiMajorAxisLength: 35km   majorAxisAzimuth: 244°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 344°   intermediateAxisPlunge: 30°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.5 [18]    Td: 0.8Xs [2]    Td*T50Ex: - [0]    To: 9.8s [15]
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:
       9km
       9km
       9km
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.1775115557829.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 73°   dip: 26°   rake: -100°
Nodal Plane 2: strike: 264°   dip: 64°   rake: -85°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 7.0   misfit: 0.11   stationDistributionRatio: 0.37   meanDistP: 39.6   meanDistT: 38.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775115557829.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.1775115557829.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 48°   dip: 32°   rake: -97°
Nodal Plane 2: strike: 236°   dip: 58°   rake: -85°
Quality: azimuthalGap: 47°   stationPolarityCount: 30   misfit: 0.20   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 35.65   fracAcc30degPref: 0.50   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775115557829.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775115557829
Event info last updated: 2026.04.02-08:38:00 UTC
Event first association/location: 2026.04.02-07:46:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA