Early-est:     Off Coast of Costa Rica    2026.10.04-14:06:43.05    q:B      mb:4.4*    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: 4.4* [13]    Mwp: - [0]    Mwpd: - [0] Region: Off Coast of Costa Rica Origin Time: 2026.10.04-14:06:43.05 UTC Hypocenter: lat: 7.45°  lon: -83.59°  [+/-15km]    depth: 130km  [+/-16km] Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 36   usedPhases: 16 minDist: 2.6°   maxDist: 144.8°   AzGap: 145°   2ndAzGap: 223°   atten: -0.91 [+/-0.52] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 44° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 35°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 301°   intermediateAxisPlunge: 25°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [6]    Td: 1.0Xs [1]    Td*T50Ex: - [0]    To: 13.8s [6] Closest plate boundaries:    Cocos \ Panama [subduction zone]: distance: ~60km    Cocos - Nazca [oceanic transform fault]: distance: ~80km    Nazca - Panama [oceanic convergent boundary]: distance: ~80km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (60km)  YES (80km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        130km        130km        130km 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: 74°   dip: 32°   rake: -163° Nodal Plane 2: strike: 329°   dip: 81°   rake: -59° Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 5.0   misfit: 0.00   stationDistributionRatio: 0.38   meanDistP: 47.5   meanDistT: 52.2   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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 207°   dip: 88°   rake: 129° Nodal Plane 2: strike: 299°   dip: 39°   rake: 3° Quality: azimuthalGap: 146°   stationPolarityCount: 14   misfit: 0.24   stationDistributionRatio: 0.86   rmsAngDiffAccPref: 41.55   fracAcc30degPref: 0.50   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1791122803051
Event info last updated: 2026.10.04-15:05:00 UTC
Event first association/location: 2026.10.04-14:19:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA