Early-est:     Mona Passage    2026.06.26-16:06:49.01    q:A      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782490009460.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782490009460.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782490009460.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* [53]    Mwp: - [0]    Mwpd: - [0]
Region: Mona Passage
Origin Time: 2026.06.26-16:06:49.01 UTC
Hypocenter: lat: 17.80°  lon: -68.59°  [+/-6km]    depth: 93km  [+/-8km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 84   usedPhases: 68
minDist: 2.3°   maxDist: 149.2°   AzGap: 47°   2ndAzGap: 56°   atten: -1.73 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 6km   azMaxHorUnc: 167°
68%ConfEllipsoid:   semiMajorAxisLength: 9km   majorAxisAzimuth: 339°   majorAxisPlunge: 62°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 175°   intermediateAxisPlunge: 27°   semiMinorAxisLength: 7km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [31]    Td: 0.3Xs [1]    Td*T50Ex: - [0]    To: 1.8s [29]
Closest plate boundaries:
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:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       93km
       93km
       93km
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.1782490009460.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 198°   dip: 58°   rake: -165°
Nodal Plane 2: strike: 100°   dip: 77°   rake: -33°
Quality: azimuthalGap: -1°   stationPolarityCount: 58   misfitWeightCount: 13.1   misfit: 0.08   stationDistributionRatio: 0.46   meanDistP: 46.1   meanDistT: 29.1   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782490009460.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.1782490009460.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 39°   dip: 55°   rake: -119°
Nodal Plane 2: strike: 264°   dip: 44°   rake: -54°
Quality: azimuthalGap: 50°   stationPolarityCount: 58   misfit: 0.29   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 35.47   fracAcc30degPref: 0.61   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782490009460.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782490009460
Event info last updated: 2026.06.26-17:05:01 UTC
Event first association/location: 2026.06.26-16:09:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA