Early-est:     North Atlantic Ocean    2025.11.11-03:28:39.40    q:B      mb:4.8    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1762831717707.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1762831717707.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1762831717707.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1762831717707.mech.fmamp_amp_mwp.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 4.8 [24]    Mwp: - [0]    Mwpd: - [0]
Region: North Atlantic Ocean
Origin Time: 2025.11.11-03:28:39.40 UTC
Hypocenter: lat: 13.61°  lon: -58.57°  [+/-16km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 52   usedPhases: 29
minDist: 4.1°   maxDist: 76.0°   AzGap: 57°   2ndAzGap: 102°   atten: -1.67 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 16km   azMaxHorUnc: 67°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 68°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 163°   intermediateAxisPlunge: 24°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [16]    Td: 0.3Xs [1]    Td*T50Ex: - [0]    To: 17.6s [8]
Closest plate boundaries:
   Caribbean / South America [subduction zone]: distance: ~100km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (100km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1762831717707.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 111°   dip: 12°   rake: -57°
Nodal Plane 2: strike: 257°   dip: 80°   rake: -96°
Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 4.8   misfit: 0.17   stationDistributionRatio: 0.43   meanDistP: 49.2   meanDistT: 41.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1762831717707.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 320°   dip: 84°   rake: -142°
Nodal Plane 2: strike: 226°   dip: 52°   rake: -7°
Quality: azimuthalGap: 57°   stationPolarityCount: 28   misfit: 0.16   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 39.64   fracAcc30degPref: 0.66   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1762831717707.mech.hash.mechanism.jpg
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
./hypo.1762831717707.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1762831717707.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1762831717707
Event info last updated: 2025.11.11-04:28:53 UTC
Event first association/location: 2025.11.11-03:39:14 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI