Early-est:     South Sandwich Islands Region    2025.07.30-09:24:40.90    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 5.2* [23]    Mwp: - [0]    Mwpd: - [0] Region: South Sandwich Islands Region Origin Time: 2025.07.30-09:24:40.90 UTC Hypocenter: lat: -58.87°  lon: -26.05°  [+/-16km]    depth: 118km  [+/-19km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 81   usedPhases: 42 minDist: 7.3°   maxDist: 153.0°   AzGap: 67°   2ndAzGap: 70°   atten: -2.18 [+/-0.52] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 46° 68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 244°   majorAxisPlunge: 43°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 16°   intermediateAxisPlunge: 35°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3 [25]    Td: 1.3Xs [2]    Td*T50Ex: - [0]    To: 2.6s [25] Closest plate boundaries:    Sandwich / South America [subduction zone]: distance: ~110km    Antarctica - South America [oceanic transform fault]: distance: ~170km    Sandwich - Antarctica [oceanic transform fault]: distance: ~170km    Sandwich - Scotia [continental transform fault]: distance: ~200km Subduction geometry:    Zone: Scotia: 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 (110km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        118km        118km        118km 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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 169°   dip: 14°   rake: -127° Nodal Plane 2: strike: 26°   dip: 79°   rake: -82° Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 6.3   misfit: 0.14   stationDistributionRatio: 0.47   meanDistP: 50.2   meanDistT: 49.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 5°   dip: 77°   rake: -154° Nodal Plane 2: strike: 269°   dip: 65°   rake: -14° Quality: azimuthalGap: 67°   stationPolarityCount: 31   misfit: 0.26   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 42.67   fracAcc30degPref: 0.61   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1753867481171
Event info last updated: 2025.07.30-10:23:03 UTC
Event first association/location: 2025.07.30-09:33:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA