Early-est:     South Sandwich Islands Region    2024.12.14-03:00:50.89    q:B      mb:5.0*    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: 5.0* [14]    Mwp: - [0]    Mwpd: 6.4Xinv [1] Region: South Sandwich Islands Region Origin Time: 2024.12.14-03:00:50.89 UTC Hypocenter: lat: -60.48°  lon: -28.58°  [+/-20km]    depth: 9km  [+/-16km] Location Quality: qualityCode:  B     stdErr: 1.7s   assocPhases: 41   usedPhases: 20 minDist: 7.5°   maxDist: 152.0°   AzGap: 105°   2ndAzGap: 140°   atten: -1.26 [+/-0.77] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 20km   azMaxHorUnc: 42° 68%ConfEllipsoid:   semiMajorAxisLength: 25km   majorAxisAzimuth: 222°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 104°   intermediateAxisPlunge: 78°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [12]    Td: 2.1Xs [1]    Td*T50Ex: - [0]    To: 6.2s [10] Closest plate boundaries:    Sandwich - Scotia [continental transform fault]: distance: ~10km    Scotia - Antarctica [oceanic transform fault]: distance: ~20km    Sandwich - Antarctica [oceanic transform fault]: distance: ~50km    Antarctica - South America [oceanic transform fault]: distance: ~140km    Sandwich / South America [subduction zone]: distance: ~140km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (140km)  no  YES (10km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        9km        9km        9km 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: 90°   dip: 11°   rake: -169° Nodal Plane 2: strike: 349°   dip: 88°   rake: -79° Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 4.9   misfit: 0.13   stationDistributionRatio: 0.36   meanDistP: 47.1   meanDistT: 48.7   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: 314°   dip: 34°   rake: -56° Nodal Plane 2: strike: 94°   dip: 62°   rake: -111° Quality: azimuthalGap: 105°   stationPolarityCount: 20   misfit: 0.26   stationDistributionRatio: 0.66   rmsAngDiffAccPref: 42.11   fracAcc30degPref: 0.41   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1734145251627
Event info last updated: 2024.12.14-03:59:00 UTC
Event first association/location: 2024.12.14-03:10:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA