Early-est:     Off East Coast of Honshu, Japan    2020.06.12-19:16:21.63    q:A      mb:4.9    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: 4.9 [37]    Mwp: 4.4X [2]    Mwpd: - [0] Region: Off East Coast of Honshu, Japan Origin Time: 2020.06.12-19:16:21.63 UTC Hypocenter: lat: 39.18°  lon: 144.10°  [+/-7km]    depth: 16km  [+/-9km] Location Quality: qualityCode:  A     stdErr: 1.0s   assocPhases: 58   usedPhases: 46 minDist: 2.8°   maxDist: 145.3°   AzGap: 151°   2ndAzGap: 163°   atten: -1.26 [+/-0.15] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 7km   maxHorUnc: 7km   azMaxHorUnc: 12° 68%ConfEllipsoid:   semiMajorAxisLength: 10km   majorAxisAzimuth: 209°   majorAxisPlunge: 52°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 347°   intermediateAxisPlunge: 30°   semiMinorAxisLength: 8km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [17]    Td: 0.8Xs [2]    Td*T50Ex: - [0]    To: 35.5s [12] Closest plate boundaries:    Pacific \ Okhotsk [subduction zone]: distance: ~10km    Okhotsk / Pacific [subduction zone]: distance: ~190km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 8km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (10km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        16km        16km        16km Slab depth at epicenter:        8km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 67°   dip: 22°   rake: -112° Nodal Plane 2: strike: 271°   dip: 70°   rake: -81° Quality: azimuthalGap: -1°   stationPolarityCount: 39   misfitWeightCount: 6.5   misfit: 0.11   stationDistributionRatio: 0.52   meanDistP: 32.4   meanDistT: 32.5   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 248°   dip: 64°   rake: -83° Nodal Plane 2: strike: 51°   dip: 27°   rake: -105° Quality: azimuthalGap: 150°   stationPolarityCount: 39   misfit: 0.23   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 24.71   fracAcc30degPref: 0.79   qualityCode: C 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/1591989394017
Event info last updated: 2020.06.12-20:16:54 UTC
Event first association/location: 2020.06.12-19:22:45 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI