Early-est:     Iceland    2026.10.05-17:28:27.25    q:A      mb:4.7    Mwp:-    Mwpd:-    Td*T50Ex:1.2     fmamp_polarity:./hypo.1791221306576.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791221306576.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791221306576.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791221306576.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: 4.7 [50]    Mwp: 5.2X [1]    Mwpd: 5.5Xinv [1]
Region: Iceland
Origin Time: 2026.10.05-17:28:27.25 UTC
Hypocenter: lat: 64.62°  lon: -17.46°  [+/-18km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 92   usedPhases: 64
minDist: 1.7°   maxDist: 62.5°   AzGap: 110°   2ndAzGap: 116°   atten: -0.91 [+/-0.31]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 18km   azMaxHorUnc: 6°
68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 186°   majorAxisPlunge: 8°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 95°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [22]    Td: 3.5s [8]    Td*T50Ex: 1.2 [8]    To: 4.6s [16]
Closest plate boundaries:
   Eurasia - North America [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:
 <1%
 <1%
 <1%
Td*T50Ex:
   1.2
   1.2
   1.2
Td*To:
     16.1
     16.1
     16.1
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791221306576.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 149°   dip: 12°   rake: -0°
Nodal Plane 2: strike: 239°   dip: 90°   rake: -102°
Quality: azimuthalGap: -1°   stationPolarityCount: 51   misfitWeightCount: 8.1   misfit: 0.10   stationDistributionRatio: 0.47   meanDistP: 32.6   meanDistT: 27.2   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791221306576.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 166°   dip: 42°   rake: 3°
Nodal Plane 2: strike: 74°   dip: 88°   rake: 132°
Quality: azimuthalGap: 114°   stationPolarityCount: 52   misfit: 0.27   stationDistributionRatio: 0.50   rmsAngDiffAccPref: 41.70   fracAcc30degPref: 0.55   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791221306576.mech.hash.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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.1791221306576.mech.fmamp_amp_aref.mechanism.jpg
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available)
Nodal Plane 1: strike: 0°   dip: 0°   rake: nan°
Nodal Plane 2: strike: nan°   dip: nan°   rake: nan°
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.1791221306576.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791221306576
Event info last updated: 2026.10.05-18:28:39 UTC
Event first association/location: 2026.10.05-17:33:35 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI