Early-est:     Drake Passage    2025.05.04-04:38:10.78    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1746333492107.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1746333492107.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1746333492107.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: 5.1* [21]    Mwp: - [0]    Mwpd: - [0]
Region: Drake Passage
Origin Time: 2025.05.04-04:38:10.78 UTC
Hypocenter: lat: -57.49°  lon: -67.65°  [+/-14km]    depth: 15km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 63   usedPhases: 34
minDist: 4.8°   maxDist: 159.3°   AzGap: 106°   2ndAzGap: 120°   atten: -1.53 [+/-0.31]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 64°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 247°   majorAxisPlunge: 8°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 339°   intermediateAxisPlunge: 12°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [15]    Td: -s [0]    Td*T50Ex: - [0]    To: 3.8s [14]
Closest plate boundaries:
   Scotia / Antarctica [subduction zone]: distance: ~30km
   Scotia - Antarctica [oceanic convergent boundary]: distance: ~190km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (30km)
 no
 no
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.1746333492107.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 233°   dip: 49°   rake: -52°
Nodal Plane 2: strike: 3°   dip: 54°   rake: -125°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 6.5   misfit: 0.05   stationDistributionRatio: 0.28   meanDistP: 50.7   meanDistT: 51.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1746333492107.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.1746333492107.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 356°   dip: 57°   rake: -129°
Nodal Plane 2: strike: 232°   dip: 49°   rake: -47°
Quality: azimuthalGap: 106°   stationPolarityCount: 25   misfit: 0.23   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 36.15   fracAcc30degPref: 0.57   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1746333492107.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1746333492107
Event info last updated: 2025.05.04-05:37:00 UTC
Event first association/location: 2025.05.04-04:44:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA