Early-est:     Mona Passage    2025.08.05-09:23:54.55    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:0.3     fmamp_polarity:./hypo.1754385830274.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754385830274.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754385830274.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* [98]    Mwp: - [0]    Mwpd: 5.5Xinv [1]
Region: Mona Passage
Origin Time: 2025.08.05-09:23:54.55 UTC
Hypocenter: lat: 17.94°  lon: -68.37°  [+/-22km]    depth: 212km  [+/-41km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 172   usedPhases: 126
minDist: 2.1°   maxDist: 166.7°   AzGap: 29°   2ndAzGap: 35°   atten: -1.08 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 22km   azMaxHorUnc: 80°
68%ConfEllipsoid:   semiMajorAxisLength: 42km   majorAxisAzimuth: 342°   majorAxisPlunge: 79°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 77°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 24km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [85]    Td: 0.8s [7]    Td*T50Ex: 0.3 [7]    To: 1.7s [84]
Closest plate boundaries:
   Caribbean - North America [oceanic transform fault]: distance: ~190km
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:
   0.3
   0.3
   0.3
Td*To:
     1.4
     1.4
     1.4
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       212km
       212km
       212km
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.1754385830274.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 45°   dip: 67°   rake: -163°
Nodal Plane 2: strike: 309°   dip: 74°   rake: -24°
Quality: azimuthalGap: -1°   stationPolarityCount: 107   misfitWeightCount: 25.2   misfit: 0.20   stationDistributionRatio: 0.58   meanDistP: 28.8   meanDistT: 33.1   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754385830274.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.1754385830274.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 56°   dip: 68°   rake: -170°
Nodal Plane 2: strike: 322°   dip: 81°   rake: -22°
Quality: azimuthalGap: 37°   stationPolarityCount: 107   misfit: 0.24   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 36.58   fracAcc30degPref: 0.51   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754385830274.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754385830274
Event info last updated: 2025.08.05-10:22:01 UTC
Event first association/location: 2025.08.05-09:31:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA