Real-Time, High-Precision, Deep-Magnitude Earthquake Catalog for Axial Seamount
Combining machine learning, cross-correlation and double-difference algorithms


Last updated on Tue Jul 8 10:48:14 UTC 2025 ( Tue Jul 8 06:48:14 EDT 2025 )

About: This website displays near-real-time, machine-learning based, double-difference hypocenter locations for earthquakes recorded by the Ocean Observatories Initiative (OOI) cabled OBS array at Axial Seamount. The continuous waveform data is processed using machine-learning methods for detection, phase arrival-time picking, and association. New events are then located relative to a high-resolution background (base) catalog using waveform cross-correlation and double-differences. For more details see here.
Precursory mixed frequency earthquakes (MFEs; blue squares in figure), lava flow events, and whale calls are also monitored, using unsupervised ML.
This web site is updated every 10 minutes.

Archived DDRT solutions:
2022: 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12
2023: 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12
2024: 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12
2025: 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12

Downloads:
  • ML-DD real-time catalog, Jan 2022 - present
  • ML-DD base catalog, 2014-2021
  • For the machine-learning based single-event location catalog before DD relocation click here.
  • Search catalogs here.

    Analysis:
  • Histograms of seismic activity
  • Most recent events (events in queue = 0):

    Q: Solution quality DX: Shift between DD and network location (km); V: version (SE.DD)
    If Q='-': No DDRT solution computed.
    tech: technical information; 3D: 3D viewer; waves: wave plots; USGS: USGS event page

    ID DATE TIME (UTC) LAT LON DEPTH ML Q DX V
    518900063 2025/07/08 08:59:45.630 45.93897 -129.98215 1.738 -0.30 1 0.19 1A.3 tech 3D waves
    518900062 2025/07/08 08:36:37.250 45.95607 -129.99446 1.698 -0.00 2 0.61 1A.3 tech 3D waves
    518900061 2025/07/08 08:27:59.120 45.98045 -130.07367 5.627 -0.00 2 7.84 1A.3 tech 3D waves
    518900060 2025/07/08 07:37:11.160 45.96386 -130.00556 2.970 0.10 2 1.12 1A.3 tech 3D waves
    518900059 2025/07/08 06:41:47.410 45.92404 -129.97642 1.412 -0.10 2 0.81 1A.3 tech 3D waves
    518900058 2025/07/08 06:25:37.200 45.92920 -129.97203 0.185 -0.40 2 0.59 1A.3 tech 3D waves
    518900057 2025/07/08 06:25:26.980 45.92725 -129.98502 0.884 0.40 2 0.40 1A.3 tech 3D waves
    518900055 2025/07/08 05:37:19.770 45.91075 -129.97593 0.864 0.50 1 0.58 1A.3 tech 3D waves
    518900054 2025/07/08 05:01:44.000 45.94146 -130.01221 0.214 0.10 2 0.71 1A.3 tech 3D waves
    518900052 2025/07/08 04:51:3.320 45.95195 -129.99823 0.020 0.60 2 1.07 1A.3 tech 3D waves
    518900051 2025/07/08 04:18:26.660 45.95946 -129.97617 0.020 0.20 2 0.66 1A.3 tech 3D waves
    518900050 2025/07/08 04:05:15.200 45.94830 -129.99380 0.343 0.40 2 0.18 1A.3 tech 3D waves
    518900049 2025/07/08 03:29:49.160 45.95479 -129.99019 1.593 0.30 1 0.09 1A.3 tech 3D waves
    518900048 2025/07/08 03:29:12.920 45.95709 -129.98901 1.732 -0.00 2 0.34 1A.3 tech 3D waves
    518900046 2025/07/08 03:26:9.710 45.94875 -129.99329 0.367 -0.20 2 0.14 1A.3 tech 3D waves
    518900047 2025/07/08 03:26:23.920 45.94758 -129.99410 0.276 0.10 2 0.42 1A.3 tech 3D waves
    518900044 2025/07/08 03:20:4.650 45.95486 -129.98998 1.596 1.10 2 0.22 1A.3 tech 3D waves
    518900045 2025/07/08 03:20:44.500 45.95489 -129.99071 0.920 0.10 2 0.79 1A.3 tech 3D waves
    518900042 2025/07/08 02:52:11.960 45.94983 -129.99609 0.362 0.40 2 0.22 1A.3 tech 3D waves
    518900041 2025/07/08 02:51:8.430 45.98734 -129.96008 1.583 0.20 2 0.79 1A.3 tech 3D waves

    Events last re/processed:
    518900061 2025/07/08 08:27:59.120 45.98045 -130.07367 5.627 -0.00 2 7.84 1A.3 tech 3D waves
    518900062 2025/07/08 08:36:37.250 45.95607 -129.99446 1.698 -0.00 2 0.61 1A.3 tech 3D waves
    518900063 2025/07/08 08:59:45.630 45.93897 -129.98215 1.738 -0.30 1 0.19 1A.3 tech 3D waves
    518900060 2025/07/08 07:37:11.160 45.96386 -130.00556 2.970 0.10 2 1.12 1A.3 tech 3D waves
    518900057 2025/07/08 06:25:26.980 45.92725 -129.98502 0.884 0.40 2 0.40 1A.3 tech 3D waves
    518900058 2025/07/08 06:25:37.200 45.92920 -129.97203 0.185 -0.40 2 0.59 1A.3 tech 3D waves
    518900059 2025/07/08 06:41:47.410 45.92404 -129.97642 1.412 -0.10 2 0.81 1A.3 tech 3D waves
    518900054 2025/07/08 05:01:44.000 45.94146 -130.01221 0.214 0.10 2 0.71 1A.3 tech 3D waves
    518900055 2025/07/08 05:37:19.770 45.91075 -129.97593 0.864 0.50 1 0.58 1A.3 tech 3D waves
    518900050 2025/07/08 04:05:15.200 45.94830 -129.99380 0.343 0.40 2 0.18 1A.3 tech 3D waves



    Histograms of seismic activity:



    ____________________________________________________________________________________________________
    Data sources: Ocean Observatories Initiative (OOI), Incorporated Research Institutions for Seismology (IRIS)
    Project funded by NSF award OCE-1536320.
    Monitoring system and website developed and maintained at the Lamont-Doherty Earth Observatory of
    Columbia University.
    Contact: Felix Waldhauser (
    felixw@ldeo.columbia.edu) and Kaiwen Wang (kw2988@columbia.edu).