Early-est:     Vancouver Island, Canada Region    2026.03.29-17:50:27.62    q:B      mb:4.3*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1774806627591.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774806627591.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774806627591.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* [13]    Mwp: - [0]    Mwpd: - [0]
Region: Vancouver Island, Canada Region
Origin Time: 2026.03.29-17:50:27.62 UTC
Hypocenter: lat: 50.76°  lon: -130.10°  [+/-13km]    depth: 52km  [+/-23km]
Location Quality: qualityCode:  B     stdErr: 0.6s   assocPhases: 14   usedPhases: 11
minDist: 7.7°   maxDist: 76.7°   AzGap: 182°   2ndAzGap: 238°   atten: -1.43 [+/-0.48]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 18°
68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 223°   majorAxisPlunge: 67°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 342°   intermediateAxisPlunge: 12°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 27.3s [8]
Closest plate boundaries:
   Juan de Fuca \ North America [subduction zone]: distance: ~30km
   Pacific - Juan de Fuca [oceanic spreading ridge]: distance: ~30km
   North America - Pacific [continental convergent boundary]: distance: ~110km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 YES (110km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       52km
       52km
       52km
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.1774806627591.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 123°   dip: 54°   rake: 43°
Nodal Plane 2: strike: 4°   dip: 57°   rake: 135°
Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 5.9   misfit: 0.17   stationDistributionRatio: 0.46   meanDistP: 53.3   meanDistT: 52.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774806627591.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.1774806627591.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 238°   stationPolarityCount: 13   misfit: 0.99   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 27.91   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774806627591.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774806627591
Event info last updated: 2026.03.29-18:49:01 UTC
Event first association/location: 2026.03.29-17:56:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA