Early-est:     Iceland Region    2026.09.27-10:57:09.28    q:C      mb:4.3*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790506629278.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790506629278.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790506629278.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: 4.3* [7]    Mwp: - [0]    Mwpd: - [0]
Region: Iceland Region
Origin Time: 2026.09.27-10:57:09.28 UTC
Hypocenter: lat: 68.98°  lon: -17.37°  [+/-36km]    depth: 15km  [+/-45km]
Location Quality: qualityCode:  C     stdErr: 1.3s   assocPhases: 10   usedPhases: 7
minDist: 4.5°   maxDist: 147.1°   AzGap: 105°   2ndAzGap: 171°   atten: -1.34 [+/-0.50]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 36km   azMaxHorUnc: 96°
68%ConfEllipsoid:   semiMajorAxisLength: 55km   majorAxisAzimuth: 285°   majorAxisPlunge: 47°   semiIntermediateAxisLength: 33km   intermediateAxisAzimuth: 68°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 21km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5X [2]    Td: -s [0]    Td*T50Ex: - [0]    To: 3.7Xs [1]
Closest plate boundaries:
   Eurasia - North America [oceanic transform fault]: distance: ~20km
   North America - Eurasia [oceanic spreading ridge]: distance: ~90km
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 (20km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
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)
./hypo.1790506629278.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 85°   dip: 17°   rake: -4°
Nodal Plane 2: strike: 179°   dip: 89°   rake: -107°
Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 3.9   misfit: 0.00   stationDistributionRatio: 0.78   meanDistP: 38.2   meanDistT: 42.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790506629278.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.1790506629278.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 24°   dip: 10°   rake: -73°
Nodal Plane 2: strike: 187°   dip: 80°   rake: -93°
Quality: azimuthalGap: 105°   stationPolarityCount: 8   misfit: 0.00   stationDistributionRatio: 0.77   rmsAngDiffAccPref: 44.66   fracAcc30degPref: 0.32   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790506629278.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790506629278
Event info last updated: 2026.09.27-11:56:01 UTC
Event first association/location: 2026.09.27-11:33:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA