Early-est:     Near Coast of Nicaragua    2025.12.16-04:55:52.61    q:B      mb:4.6    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 4.6 [9]    Mwp: 4.3X [3]    Mwpd: - [0] Region: Near Coast of Nicaragua Origin Time: 2025.12.16-04:55:52.61 UTC Hypocenter: lat: 11.61°  lon: -86.59°  [+/-20km]    depth: 77km  [+/-20km] Location Quality: qualityCode:  B     stdErr: 1.7s   assocPhases: 22   usedPhases: 16 minDist: 1.2°   maxDist: 158.3°   AzGap: 78°   2ndAzGap: 114°   atten: -2.27 [+/-0.27] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 20km   azMaxHorUnc: 75° 68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 77°   majorAxisPlunge: 33°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 192°   intermediateAxisPlunge: 33°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.8Xs [1] Closest plate boundaries:    Caribbean / Cocos [subduction zone]: distance: ~110km    Panama - Caribbean [continental convergent boundary]: distance: ~140km    Cocos \ Panama [subduction zone]: distance: ~150km    Cocos \ North America [subduction zone]: distance: ~480km Subduction geometry:    Zone: Central America    Slab depth at epicenter: 48km 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:        77km        77km        77km Slab depth at epicenter:        48km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 122°   dip: 53°   rake: -151° Nodal Plane 2: strike: 14°   dip: 67°   rake: -41° Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 8.7   misfit: 0.11   stationDistributionRatio: 0.58   meanDistP: 26.1   meanDistT: 27.0   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 118°   dip: 62°   rake: -156° Nodal Plane 2: strike: 16°   dip: 69°   rake: -30° Quality: azimuthalGap: 66°   stationPolarityCount: 16   misfit: 0.35   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 47.53   fracAcc30degPref: 0.42   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1765860954362
Event info last updated: 2025.12.16-05:56:02 UTC
Event first association/location: 2025.12.16-05:01:21 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI