Early-est:     Near East Coast of Honshu, Japan    2024.12.17-13:11:17.57    q:C      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: Near East Coast of Honshu, Japan Origin Time: 2024.12.17-13:11:17.57 UTC Hypocenter: lat: 36.30°  lon: 140.25°  [+/-34km]    depth: 62km  [+/-44km] Location Quality: qualityCode:  C     stdErr: 2.0s   assocPhases: 38   usedPhases: 19 minDist: 1.7°   maxDist: 148.1°   AzGap: 111°   2ndAzGap: 122°   atten: -0.71 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 24km   maxHorUnc: 34km   azMaxHorUnc: 119° 68%ConfEllipsoid:   semiMajorAxisLength: 48km   majorAxisAzimuth: 312°   majorAxisPlunge: 50°   semiIntermediateAxisLength: 39km   intermediateAxisAzimuth: 100°   intermediateAxisPlunge: 36°   semiMinorAxisLength: 29km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.5 [4]    Td: -s [0]    Td*T50Ex: - [0]    To: 64.9s [4] Closest plate boundaries:    Okhotsk - Philippine Sea [continental transform fault]: distance: ~170km    Okhotsk - Amur [continental convergent boundary]: distance: ~190km    Amur / Philippine Sea [subduction zone]: distance: ~200km    Pacific \ Okhotsk [subduction zone]: distance: ~210km    Philippine Sea / Pacific [subduction zone]: distance: ~280km    Okhotsk / Pacific [subduction zone]: distance: ~620km Subduction geometry:    Zone: Kamchatka/Kurils/Japan: 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 (200km)  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        62km        62km        62km 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: 122°   dip: 26°   rake: 96° Nodal Plane 2: strike: 296°   dip: 64°   rake: 87° Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 4.4   misfit: 0.08   stationDistributionRatio: 0.49   meanDistP: 51.2   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: 222°   dip: 62°   rake: 120° Nodal Plane 2: strike: 352°   dip: 40°   rake: 47° Quality: azimuthalGap: 122°   stationPolarityCount: 11   misfit: 0.37   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 49.34   fracAcc30degPref: 0.28   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1734441075931
Event info last updated: 2024.12.17-14:10:00 UTC
Event first association/location: 2024.12.17-13:14:06 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA