Early-est:     Northern Mid - Atlantic Ridge    2026.10.08-20:59:33.47    q:A      mb:5.0    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 5.0 [72]    Mwp: - [0]    Mwpd: - [0] Region: Northern Mid - Atlantic Ridge Origin Time: 2026.10.08-20:59:33.47 UTC Hypocenter: lat: 30.51°  lon: -41.89°  [+/-11km]    depth: 7km  [+/-13km] Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 112   usedPhases: 82 minDist: 15.3°   maxDist: 163.2°   AzGap: 48°   2ndAzGap: 58°   atten: -0.60 [+/-0.27] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 11km   azMaxHorUnc: 122° 68%ConfEllipsoid:   semiMajorAxisLength: 14km   majorAxisAzimuth: 133°   majorAxisPlunge: 47°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 270°   intermediateAxisPlunge: 35°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3 [37]    Td: 2.5Xs [2]    Td*T50Ex: - [0]    To: 2.0s [36] Closest plate boundaries:    North America - Africa [oceanic spreading ridge]: distance: ~10km 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:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        7km        7km        7km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 112°   dip: 46°   rake: -155° Nodal Plane 2: strike: 4°   dip: 72°   rake: -47° Quality: azimuthalGap: -1°   stationPolarityCount: 78   misfitWeightCount: 10.3   misfit: 0.26   stationDistributionRatio: 0.40   meanDistP: 52.1   meanDistT: 46.9   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 31°   dip: 89°   rake: 117° Nodal Plane 2: strike: 123°   dip: 27°   rake: 2° Quality: azimuthalGap: 54°   stationPolarityCount: 78   misfit: 0.36   stationDistributionRatio: 0.60   rmsAngDiffAccPref: 43.12   fracAcc30degPref: 0.43   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1791493174690
Event info last updated: 2026.10.08-21:59:43 UTC
Event first association/location: 2026.10.08-21:07:47 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI