Early-est:     Near Coast of Northern Calif.    2024.12.15-07:22:08.42    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:1.2     fmamp_polarity:./hypo.1734247326351.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1734247326351.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1734247326351.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: 5.0* [55]    Mwp: 5.3X [3]    Mwpd: 5.5Xinv [2]
Region: Near Coast of Northern Calif.
Origin Time: 2024.12.15-07:22:08.42 UTC
Hypocenter: lat: 40.62°  lon: -124.67°  [+/-18km]    depth: 32km  [+/-23km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 93   usedPhases: 71
minDist: 4.1°   maxDist: 152.7°   AzGap: 117°   2ndAzGap: 147°   atten: -0.88 [+/-0.17]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 18km   azMaxHorUnc: 39°
68%ConfEllipsoid:   semiMajorAxisLength: 27km   majorAxisAzimuth: 43°   majorAxisPlunge: 47°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 208°   intermediateAxisPlunge: 42°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [46]    Td: 3.2s [7]    Td*T50Ex: 1.2 [7]    To: 6.5s [42]
Closest plate boundaries:
   Juan de Fuca \ North America [subduction zone]: distance: ~20km
   Pacific - Juan de Fuca [oceanic transform fault]: distance: ~40km
   North America - Pacific [continental transform fault]: distance: ~40km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (20km)
 no
 YES (40km)
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.2
   1.2
   1.2
Td*To:
     20.8
     20.8
     20.8
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       32km
       32km
       32km
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.1734247326351.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 20°   dip: 39°   rake: -38°
Nodal Plane 2: strike: 141°   dip: 67°   rake: -122°
Quality: azimuthalGap: -1°   stationPolarityCount: 56   misfitWeightCount: 12.5   misfit: 0.20   stationDistributionRatio: 0.43   meanDistP: 38.4   meanDistT: 47.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1734247326351.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.1734247326351.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: 168°   stationPolarityCount: 56   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1734247326351.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1734247326351
Event info last updated: 2024.12.15-08:21:02 UTC
Event first association/location: 2024.12.15-07:26:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA