Early-est:     North Atlantic Ocean    2026.05.30-21:27:24.15    q:B      mb:5.4*    Mwp:5.5    Mwpd:-    Td*T50Ex:0.6     fmamp_polarity:     fmamp_polarity_waveform:     hash:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.4* [124]    Mwp: 5.5 [17]    Mwpd: 5.9Xinv [16] Region: North Atlantic Ocean Origin Time: 2026.05.30-21:27:24.15 UTC Hypocenter: lat: 11.83°  lon: -59.18°  [+/-35km]    depth: 15km  [+/-35km] Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 169   usedPhases: 140 minDist: 1.4°   maxDist: 153.4°   AzGap: 42°   2ndAzGap: 56°   atten: -1.97 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 35km   azMaxHorUnc: 177° 68%ConfEllipsoid:   semiMajorAxisLength: 43km   majorAxisAzimuth: 178°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 36km   intermediateAxisAzimuth: 302°   intermediateAxisPlunge: 72°   semiMinorAxisLength: 24km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [118]    Td: 1.4s [16]    Td*T50Ex: 0.6 [16]    To: 3.0s [116] Closest plate boundaries:    Caribbean - South America [continental transform fault]: distance: ~180km    Caribbean / South America [subduction zone]: distance: ~190km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (190km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    0.6    0.6    0.6 Td*To:      4.2      4.2      4.2 Mwp magnitude:        5.5        5.5        5.5 Hypocenter depth:        15km        15km        15km 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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 111°   dip: 37°   rake: 93° Nodal Plane 2: strike: 287°   dip: 53°   rake: 88° Quality: azimuthalGap: -1°   stationPolarityCount: 117   misfitWeightCount: 13.8   misfit: 0.17   stationDistributionRatio: 0.42   meanDistP: 39.2   meanDistT: 45.0   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 76°   dip: 26°   rake: 34° Nodal Plane 2: strike: 315°   dip: 76°   rake: 112° Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 4.3   misfit: 0.00   stationDistributionRatio: 0.52   meanDistP: 44.9   meanDistT: 42.6   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 291°   dip: 50°   rake: 96° Nodal Plane 2: strike: 101°   dip: 40°   rake: 83° Quality: azimuthalGap: 54°   stationPolarityCount: 117   misfit: 0.23   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 33.38   fracAcc30degPref: 0.65   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1780176456821
Event info last updated: 2026.05.30-22:26:02 UTC
Event first association/location: 2026.05.30-21:35:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA