Early-est:     Halmahera, Indonesia    2026.03.26-12:41:44.80    q:C      mb:4.5*    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: 4.5* [9]    Mwp: - [0]    Mwpd: - [0] Region: Halmahera, Indonesia Origin Time: 2026.03.26-12:41:44.80 UTC Hypocenter: lat: 2.69°  lon: 128.41°  [+/-17km]    depth: 173km  [+/-31km] Location Quality: qualityCode:  C     stdErr: 1.0s   assocPhases: 17   usedPhases: 9 minDist: 6.8°   maxDist: 81.1°   AzGap: 136°   2ndAzGap: 185°   atten: -1.43 [+/-0.84] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 17km   azMaxHorUnc: 38° 68%ConfEllipsoid:   semiMajorAxisLength: 33km   majorAxisAzimuth: 237°   majorAxisPlunge: 65°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 2°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4X [3]    Td: 0.5Xs [1]    Td*T50Ex: - [0]    To: 11.2Xs [3] Closest plate boundaries:    Sunda - Birds Head [continental convergent boundary]: distance: ~60km    Philippine Sea \ Sunda [subduction zone]: distance: ~80km    Birds Head / Sunda [subduction zone]: distance: ~170km    Birds Head / Philippine Sea [subduction zone]: distance: ~200km    Molucca Sea \ Sunda [subduction zone]: distance: ~250km    Molucca Sea \ Birds Head [subduction zone]: distance: ~250km    Molucca Sea / Sunda [subduction zone]: distance: ~390km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (80km)  YES (60km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        173km        173km        173km 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):    (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
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):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 0°   stationPolarityCount: 7   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: F Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1774528906844
Event info last updated: 2026.03.26-13:40:03 UTC
Event first association/location: 2026.03.26-12:49:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA