Early-est:     Prince Edward Islands Region    2026.02.07-11:03:20.95    q:C      mb:4.9*    Mwp:5.5    Mwpd:-    Td*T50Ex:1.2     fmamp_polarity:./hypo.1770462202314.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770462202314.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770462202314.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: 4.9* [21]    Mwp: 5.5 [5]    Mwpd: 5.5Xinv [4]
Region: Prince Edward Islands Region
Origin Time: 2026.02.07-11:03:20.95 UTC
Hypocenter: lat: -44.24°  lon: 38.26°  [+/-45km]    depth: 9km  [+/-40km]
Location Quality: qualityCode:  C     stdErr: 1.8s   assocPhases: 55   usedPhases: 26
minDist: 14.3°   maxDist: 159.4°   AzGap: 51°   2ndAzGap: 99°   atten: -1.18 [+/-0.41]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 29km   maxHorUnc: 45km   azMaxHorUnc: 68°
68%ConfEllipsoid:   semiMajorAxisLength: 57km   majorAxisAzimuth: 250°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 39km   intermediateAxisAzimuth: 8°   intermediateAxisPlunge: 60°   semiMinorAxisLength: 35km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [13]    Td: 3.3s [7]    Td*T50Ex: 1.2 [7]    To: 5.2s [12]
Closest plate boundaries:
   Somalia - Antarctica [oceanic transform fault]: distance: ~20km
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:
   1.2
   1.2
   1.2
Td*To:
     17.2
     17.2
     17.2
Mwp magnitude:
       5.5
       5.5
       5.5
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)
./hypo.1770462202314.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 116°   dip: 20°   rake: 39°
Nodal Plane 2: strike: 349°   dip: 77°   rake: 106°
Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 5.9   misfit: 0.17   stationDistributionRatio: 0.36   meanDistP: 52.5   meanDistT: 51.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770462202314.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.1770462202314.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 229°   dip: 55°   rake: -174°
Nodal Plane 2: strike: 136°   dip: 85°   rake: -35°
Quality: azimuthalGap: 76°   stationPolarityCount: 19   misfit: 0.26   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 51.27   fracAcc30degPref: 0.38   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770462202314.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770462202314
Event info last updated: 2026.02.07-12:02:00 UTC
Event first association/location: 2026.02.07-11:17:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA