Early-est:     Northern Peru    2026.04.01-11:20:24.23    q:A      mb:5.5    Mwp:6.0*    Mwpd:-    Td*T50Ex:0.8     fmamp_polarity:./hypo.1775042425941.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775042425941.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775042425941.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: 5.5 [111]    Mwp: 6.0* [54]    Mwpd: 6.1Xinv [57]
Region: Northern Peru
Origin Time: 2026.04.01-11:20:24.23 UTC
Hypocenter: lat: -7.07°  lon: -76.14°  [+/-12km]    depth: 90km  [+/-16km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 286   usedPhases: 157
minDist: 12.1°   maxDist: 173.3°   AzGap: 42°   2ndAzGap: 62°   atten: -1.16 [+/-0.35]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 12km   azMaxHorUnc: 80°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 126°   majorAxisPlunge: 85°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 260°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.3 [90]    Td: 2.9s [23]    Td*T50Ex: 0.8 [23]    To: 2.2s [90]
Closest plate boundaries:
   Nazca \ South America [subduction zone]: distance: ~560km
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:
   0.8
   0.8
   0.8
Td*To:
     6.4
     6.4
     6.4
Mwp magnitude:
       6.0*
       6.0*
       6.0*
Hypocenter depth:
       90km
       90km
       90km
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.1775042425941.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 4°   dip: 40°   rake: -66°
Nodal Plane 2: strike: 154°   dip: 54°   rake: -109°
Quality: azimuthalGap: -1°   stationPolarityCount: 104   misfitWeightCount: 18.9   misfit: 0.08   stationDistributionRatio: 0.60   meanDistP: 21.0   meanDistT: 28.1   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775042425941.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 329°   dip: 38°   rake: -65°
Nodal Plane 2: strike: 117°   dip: 56°   rake: -109°
Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 5.5   misfit: 0.01   stationDistributionRatio: 0.67   meanDistP: 39.5   meanDistT: 44.1   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1775042425941.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 343°   dip: 36°   rake: -78°
Nodal Plane 2: strike: 148°   dip: 55°   rake: -99°
Quality: azimuthalGap: 102°   stationPolarityCount: 104   misfit: 0.08   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 28.97   fracAcc30degPref: 0.73   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775042425941.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775042425941
Event info last updated: 2026.04.01-12:18:20 UTC
Event first association/location: 2026.04.01-11:26:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA