Early-est:     Jan Mayen Island Region    2026.09.26-02:52:59.31    q:C      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     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: 4.5* [11]    Mwp: - [0]    Mwpd: - [0] Region: Jan Mayen Island Region Origin Time: 2026.09.26-02:52:59.31 UTC Hypocenter: lat: 69.12°  lon: -16.90°  [+/-39km]    depth: 9km  [+/-35km] Location Quality: qualityCode:  C     stdErr: 3.2s   assocPhases: 16   usedPhases: 12 minDist: 4.7°   maxDist: 171.6°   AzGap: 102°   2ndAzGap: 182°   atten: -1.49 [+/-0.62] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 25km   maxHorUnc: 39km   azMaxHorUnc: 75° 68%ConfEllipsoid:   semiMajorAxisLength: 51km   majorAxisAzimuth: 255°   majorAxisPlunge: 24°   semiIntermediateAxisLength: 31km   intermediateAxisAzimuth: 132°   intermediateAxisPlunge: 50°   semiMinorAxisLength: 31km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [6]    Td: 4.6Xs [1]    Td*T50Ex: - [0]    To: 7.2s [4] Closest plate boundaries:    Eurasia - North America [oceanic spreading ridge]: distance: ~30km    North America - Eurasia [oceanic spreading ridge]: distance: ~70km 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:        9km        9km        9km 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: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 184°   dip: 36°   rake: 87° Nodal Plane 2: strike: 8°   dip: 54°   rake: 92° Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 2.3   misfit: 0.03   stationDistributionRatio: 0.40   meanDistP: 54.9   meanDistT: 53.4   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 246°   dip: 71°   rake: -159° Nodal Plane 2: strike: 149°   dip: 70°   rake: -20° Quality: azimuthalGap: 116°   stationPolarityCount: 12   misfit: 0.34   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 53.02   fracAcc30degPref: 0.24   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1790391179472
Event info last updated: 2026.09.26-03:51:01 UTC
Event first association/location: 2026.09.26-02:59:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA