Early-est:     Central Mid - Atlantic Ridge    2024.12.17-05:06:04.29    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1734411965755.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1734411965755.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1734411965755.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* [57]    Mwp: - [0]    Mwpd: - [0]
Region: Central Mid - Atlantic Ridge
Origin Time: 2024.12.17-05:06:04.29 UTC
Hypocenter: lat: 0.81°  lon: -29.00°  [+/-20km]    depth: 77km  [+/-45km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 77   usedPhases: 57
minDist: 9.6°   maxDist: 143.3°   AzGap: 46°   2ndAzGap: 89°   atten: -2.30 [+/-0.48]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 20km   azMaxHorUnc: 147°
68%ConfEllipsoid:   semiMajorAxisLength: 46km   majorAxisAzimuth: 8°   majorAxisPlunge: 83°   semiIntermediateAxisLength: 24km   intermediateAxisAzimuth: 145°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [34]    Td: 3.1s [5]    Td*T50Ex: 1.1 [5]    To: 3.6s [30]
Closest plate boundaries:
   Africa - South America [oceanic transform fault]: distance: ~20km
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 (20km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     11.2
     11.2
     11.2
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       77km
       77km
       77km
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.1734411965755.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 59°   dip: 79°   rake: 1°
Nodal Plane 2: strike: 329°   dip: 89°   rake: 169°
Quality: azimuthalGap: -1°   stationPolarityCount: 51   misfitWeightCount: 7.0   misfit: 0.10   stationDistributionRatio: 0.38   meanDistP: 51.7   meanDistT: 52.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1734411965755.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.1734411965755.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 335°   dip: 84°   rake: 172°
Nodal Plane 2: strike: 66°   dip: 82°   rake: 6°
Quality: azimuthalGap: 47°   stationPolarityCount: 51   misfit: 0.29   stationDistributionRatio: 0.77   rmsAngDiffAccPref: 36.81   fracAcc30degPref: 0.50   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1734411965755.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1734411965755
Event info last updated: 2024.12.17-06:05:00 UTC
Event first association/location: 2024.12.17-05:16:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA