Early-est:     Qinghai, China    2026.06.23-15:29:04.33    q:B      mb:5.2*    Mwp:5.4    Mwpd:-    Td*T50Ex:0.8     fmamp_polarity:./hypo.1782228549674.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782228549674.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782228549674.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: 5.2* [96]    Mwp: 5.4 [11]    Mwpd: 5.5Xinv [11]
Region: Qinghai, China
Origin Time: 2026.06.23-15:29:04.33 UTC
Hypocenter: lat: 37.85°  lon: 95.42°  [+/-26km]    depth: 2km  [+/-24km]
Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 152   usedPhases: 94
minDist: 12.6°   maxDist: 145.3°   AzGap: 45°   2ndAzGap: 53°   atten: -1.15 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 21km   maxHorUnc: 26km   azMaxHorUnc: 6°
68%ConfEllipsoid:   semiMajorAxisLength: 33km   majorAxisAzimuth: 5°   majorAxisPlunge: 19°   semiIntermediateAxisLength: 26km   intermediateAxisAzimuth: 270°   intermediateAxisPlunge: 12°   semiMinorAxisLength: 23km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [57]    Td: 2.0s [16]    Td*T50Ex: 0.8 [16]    To: 3.9s [54]
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:
   0.8
   0.8
   0.8
Td*To:
     7.8
     7.8
     7.8
Mwp magnitude:
       5.4
       5.4
       5.4
Hypocenter depth:
       2km
       2km
       2km
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.1782228549674.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 309°   dip: 45°   rake: 120°
Nodal Plane 2: strike: 90°   dip: 52°   rake: 63°
Quality: azimuthalGap: -1°   stationPolarityCount: 81   misfitWeightCount: 13.2   misfit: 0.22   stationDistributionRatio: 0.66   meanDistP: 45.5   meanDistT: 42.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782228549674.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.1782228549674.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 330°   dip: 64°   rake: -180°
Nodal Plane 2: strike: 240°   dip: 90°   rake: -26°
Quality: azimuthalGap: 53°   stationPolarityCount: 81   misfit: 0.26   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 37.89   fracAcc30degPref: 0.62   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782228549674.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782228549674
Event info last updated: 2026.06.23-16:28:01 UTC
Event first association/location: 2026.06.23-15:34:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA