Early-est:     Halmahera, Indonesia    2026.06.22-05:28:13.99    q:B      mb:4.9*    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: 4.9* [24]    Mwp: 4.6X [1]    Mwpd: - [0] Region: Halmahera, Indonesia Origin Time: 2026.06.22-05:28:13.99 UTC Hypocenter: lat: 1.82°  lon: 127.57°  [+/-14km]    depth: 112km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 0.7s   assocPhases: 52   usedPhases: 26 minDist: 1.1°   maxDist: 98.2°   AzGap: 131°   2ndAzGap: 143°   atten: -0.83 [+/-0.39] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 162° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 172°   majorAxisPlunge: 75°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 341°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 94% T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.5s [8] Closest plate boundaries:    Sunda - Birds Head [continental convergent boundary]: distance: ~60km    Birds Head / Sunda [subduction zone]: distance: ~100km    Molucca Sea \ Sunda [subduction zone]: distance: ~130km    Molucca Sea \ Birds Head [subduction zone]: distance: ~130km    Philippine Sea \ Sunda [subduction zone]: distance: ~190km    Birds Head / Philippine Sea [subduction zone]: distance: ~200km    Molucca Sea / Sunda [subduction zone]: distance: ~250km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (100km)  YES (60km)  no Prob underwater:  94%  94%  94% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        112km        112km        112km 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: 89°   dip: 15°   rake: -2° Nodal Plane 2: strike: 181°   dip: 89°   rake: -105° Quality: azimuthalGap: -1°   stationPolarityCount: 26   misfitWeightCount: 7.9   misfit: 0.15   stationDistributionRatio: 0.44   meanDistP: 51.8   meanDistT: 48.1   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: 270°   dip: 63°   rake: -160° Nodal Plane 2: strike: 171°   dip: 72°   rake: -28° Quality: azimuthalGap: 130°   stationPolarityCount: 26   misfit: 0.22   stationDistributionRatio: 0.88   rmsAngDiffAccPref: 41.79   fracAcc30degPref: 0.58   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782106092954
Event info last updated: 2026.06.22-06:27:00 UTC
Event first association/location: 2026.06.22-05:34:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA