Early-est:     Central Mid - Atlantic Ridge    2026.10.13-05:45:07.03    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791870293150.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1791870293150.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1791870293150.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: 5.1* [42]    Mwp: 6.6X [3]    Mwpd: 6.7Xinv [4]
Region: Central Mid - Atlantic Ridge
Origin Time: 2026.10.13-05:45:07.03 UTC
Hypocenter: lat: -0.06°  lon: -19.41°  [+/-16km]    depth: 115km  [+/-31km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 80   usedPhases: 30
minDist: 15.6°   maxDist: 166.6°   AzGap: 71°   2ndAzGap: 89°   atten: -1.83 [+/-0.50]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 16km   azMaxHorUnc: 86°
68%ConfEllipsoid:   semiMajorAxisLength: 32km   majorAxisAzimuth: 27°   majorAxisPlunge: 76°   semiIntermediateAxisLength: 20km   intermediateAxisAzimuth: 276°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [40]    Td: 4.9Xs [1]    Td*T50Ex: - [0]    To: 48.4s [26]
Closest plate boundaries:
   Africa - South America [oceanic transform fault]: distance: ~40km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 YES (40km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       115km
       115km
       115km
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.1791870293150.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 97°   dip: 22°   rake: -18°
Nodal Plane 2: strike: 204°   dip: 83°   rake: -111°
Quality: azimuthalGap: -1°   stationPolarityCount: 35   misfitWeightCount: 5.8   misfit: 0.16   stationDistributionRatio: 0.40   meanDistP: 52.4   meanDistT: 50.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791870293150.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.1791870293150.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 342°   dip: 84°   rake: 170°
Nodal Plane 2: strike: 73°   dip: 80°   rake: 6°
Quality: azimuthalGap: 86°   stationPolarityCount: 35   misfit: 0.19   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 40.74   fracAcc30degPref: 0.59   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791870293150.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1791870293150
Event info last updated: 2026.10.13-06:44:08 UTC
Event first association/location: 2026.10.13-05:54:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA