Early-est:     Afghanistan - Tajikistan Bord Reg.    2026.04.03-16:12:57.02    q:B      mb:5.4    Mwp:5.8*    Mwpd:-    Td*T50Ex:1.3     fmamp_polarity:./hypo.1775232781072.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775232781072.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775232781072.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: 5.4 [145]    Mwp: 5.8* [60]    Mwpd: 6.0Xinv [64]
Region: Afghanistan - Tajikistan Bord Reg.
Origin Time: 2026.04.03-16:12:57.02 UTC
Hypocenter: lat: 36.44°  lon: 71.03°  [+/-19km]    depth: 159km  [+/-27km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 271   usedPhases: 184
minDist: 4.5°   maxDist: 150.5°   AzGap: 19°   2ndAzGap: 29°   atten: -1.50 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 17km   maxHorUnc: 19km   azMaxHorUnc: 22°
68%ConfEllipsoid:   semiMajorAxisLength: 30km   majorAxisAzimuth: 11°   majorAxisPlunge: 54°   semiIntermediateAxisLength: 22km   intermediateAxisAzimuth: 276°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 18km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.8 [143]    Td: 1.7s [42]    Td*T50Ex: 1.3 [42]    To: 3.6s [140]
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:
   1.3
   1.3
   1.3
Td*To:
     6.1
     6.1
     6.1
Mwp magnitude:
       5.8*
       5.8*
       5.8*
Hypocenter depth:
       159km
       159km
       159km
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.1775232781072.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 63°   dip: 36°   rake: 91°
Nodal Plane 2: strike: 242°   dip: 54°   rake: 90°
Quality: azimuthalGap: -1°   stationPolarityCount: 134   misfitWeightCount: 30.9   misfit: 0.14   stationDistributionRatio: 0.71   meanDistP: 22.4   meanDistT: 18.3   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775232781072.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):
Nodal Plane 1: strike: 67°   dip: 35°   rake: 83°
Nodal Plane 2: strike: 256°   dip: 56°   rake: 95°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 9.6   misfit: 0.00   stationDistributionRatio: 0.62   meanDistP: 33.5   meanDistT: 25.1   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1775232781072.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 103°   dip: 42°   rake: 93°
Nodal Plane 2: strike: 278°   dip: 48°   rake: 87°
Quality: azimuthalGap: 35°   stationPolarityCount: 134   misfit: 0.23   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 30.87   fracAcc30degPref: 0.68   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775232781072.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775232781072
Event info last updated: 2026.04.03-17:11:03 UTC
Event first association/location: 2026.04.03-16:19:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA