Early-est:     Near Coast of Libya    2026.09.27-03:27:29.61    q:C      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790479652102.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790479652102.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790479652102.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: 4.2* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Near Coast of Libya
Origin Time: 2026.09.27-03:27:29.61 UTC
Hypocenter: lat: 31.82°  lon: 15.45°  [+/-59km]    depth: 5km  [+/-30km]
Location Quality: qualityCode:  C     stdErr: 1.1s   assocPhases: 14   usedPhases: 12
minDist: 4.3°   maxDist: 49.4°   AzGap: 261°   2ndAzGap: 275°   atten: -1.76 [+/-0.51]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 59km   azMaxHorUnc: 21°
68%ConfEllipsoid:   semiMajorAxisLength: 74km   majorAxisAzimuth: 201°   majorAxisPlunge: 9°   semiIntermediateAxisLength: 29km   intermediateAxisAzimuth: 106°   intermediateAxisPlunge: 27°   semiMinorAxisLength: 27km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 71%
T50Ex: 0.6 [7]    Td: 4.0Xs [1]    Td*T50Ex: - [0]    To: 10.2s [7]
Closest plate boundaries:
   Eurasia / Africa [subduction zone]: distance: ~610km
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:
 71%
 71%
 71%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       5km
       5km
       5km
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.1790479652102.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 71°   dip: 74°   rake: 16°
Nodal Plane 2: strike: 337°   dip: 75°   rake: 163°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 7.2   misfit: 0.00   stationDistributionRatio: 0.32   meanDistP: 47.8   meanDistT: 45.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790479652102.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.1790479652102.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 261°   stationPolarityCount: 11   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790479652102.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790479652102
Event info last updated: 2026.09.27-04:26:01 UTC
Event first association/location: 2026.09.27-03:32:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA