Early-est:     Jujuy Province, Argentina    2026.06.20-01:22:21.50    q:B      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1781918542398.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781918542398.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781918542398.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: 4.5* [27]    Mwp: - [0]    Mwpd: - [0]
Region: Jujuy Province, Argentina
Origin Time: 2026.06.20-01:22:21.50 UTC
Hypocenter: lat: -22.34°  lon: -66.34°  [+/-15km]    depth: 227km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 72   usedPhases: 32
minDist: 4.1°   maxDist: 153.8°   AzGap: 88°   2ndAzGap: 105°   atten: -1.13 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 15km   azMaxHorUnc: 101°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 97°   majorAxisPlunge: 31°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 300°   intermediateAxisPlunge: 57°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.0 [10]    Td: 0.2Xs [1]    Td*T50Ex: - [0]    To: 2.1s [10]
Closest plate boundaries:
   Altiplano - South America [continental rift boundary]: distance: ~100km
   Nazca \ South America [subduction zone]: distance: ~510km
   Nazca \ Altiplano [subduction zone]: distance: ~510km
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?:
 YES (510km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       227km
       227km
       227km
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.1781918542398.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 79°   dip: 48°   rake: 148°
Nodal Plane 2: strike: 192°   dip: 66°   rake: 46°
Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 8.6   misfit: 0.08   stationDistributionRatio: 0.59   meanDistP: 44.3   meanDistT: 39.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781918542398.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.1781918542398.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 109°   dip: 76°   rake: -147°
Nodal Plane 2: strike: 10°   dip: 58°   rake: -17°
Quality: azimuthalGap: 121°   stationPolarityCount: 28   misfit: 0.31   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 33.49   fracAcc30degPref: 0.65   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781918542398.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781918542398
Event info last updated: 2026.06.20-02:21:00 UTC
Event first association/location: 2026.06.20-01:27:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA