Early-est:     Peru - Brazil Border Region    2025.08.03-11:42:51.85    q:A      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754221372474.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754221372474.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754221372474.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* [54]    Mwp: - [0]    Mwpd: - [0]
Region: Peru - Brazil Border Region
Origin Time: 2025.08.03-11:42:51.85 UTC
Hypocenter: lat: -9.15°  lon: -71.44°  [+/-13km]    depth: 474km  [+/-19km]
Location Quality: qualityCode:  A     stdErr: 1.0s   assocPhases: 112   usedPhases: 79
minDist: 6.0°   maxDist: 149.8°   AzGap: 44°   2ndAzGap: 76°   atten: -1.36 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 13km   azMaxHorUnc: 86°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 250°   majorAxisPlunge: 66°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 93°   intermediateAxisPlunge: 22°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.0 [42]    Td: 0.7Xs [2]    Td*T50Ex: - [0]    To: 1.4s [42]
Closest plate boundaries:
Subduction geometry:    Zone: South America: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       474km
       474km
       474km
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.1754221372474.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 294°   dip: 51°   rake: -2°
Nodal Plane 2: strike: 25°   dip: 89°   rake: -141°
Quality: azimuthalGap: -1°   stationPolarityCount: 54   misfitWeightCount: 12.9   misfit: 0.11   stationDistributionRatio: 0.46   meanDistP: 27.6   meanDistT: 49.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754221372474.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.1754221372474.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 302°   dip: 40°   rake: 12°
Nodal Plane 2: strike: 202°   dip: 82°   rake: 129°
Quality: azimuthalGap: 123°   stationPolarityCount: 54   misfit: 0.21   stationDistributionRatio: 0.87   rmsAngDiffAccPref: 20.03   fracAcc30degPref: 0.93   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754221372474.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754221372474
Event info last updated: 2025.08.03-12:40:15 UTC
Event first association/location: 2025.08.03-11:48:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA