Early-est:     Northern Mid - Atlantic Ridge    2026.03.30-14:43:36.44    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1774881817139.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774881817139.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774881817139.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* [52]    Mwp: - [0]    Mwpd: - [0]
Region: Northern Mid - Atlantic Ridge
Origin Time: 2026.03.30-14:43:36.44 UTC
Hypocenter: lat: 24.38°  lon: -45.79°  [+/-12km]    depth: 2km  [+/-13km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 68   usedPhases: 54
minDist: 20.0°   maxDist: 169.8°   AzGap: 119°   2ndAzGap: 130°   atten: -1.97 [+/-0.53]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 12km   azMaxHorUnc: 175°
68%ConfEllipsoid:   semiMajorAxisLength: 15km   majorAxisAzimuth: 176°   majorAxisPlunge: 7°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 286°   intermediateAxisPlunge: 72°   semiMinorAxisLength: 11km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [22]    Td: 2.4Xs [2]    Td*T50Ex: - [0]    To: 1.5s [20]
Closest plate boundaries:
   North America - Africa [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:
       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.1774881817139.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 63°   dip: 18°   rake: 133°
Nodal Plane 2: strike: 198°   dip: 77°   rake: 77°
Quality: azimuthalGap: -1°   stationPolarityCount: 47   misfitWeightCount: 3.9   misfit: 0.08   stationDistributionRatio: 0.59   meanDistP: 50.7   meanDistT: 50.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774881817139.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.1774881817139.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 204°   dip: 81°   rake: 158°
Nodal Plane 2: strike: 298°   dip: 69°   rake: 10°
Quality: azimuthalGap: 119°   stationPolarityCount: 47   misfit: 0.22   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 8.35   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774881817139.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774881817139
Event info last updated: 2026.03.30-15:42:01 UTC
Event first association/location: 2026.03.30-14:54:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA