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


Last updated on Sat Jul 19 01:04:20 UTC 2025 ( Fri Jul 18 21:04:20 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
    519900122 2025/07/18 15:45:48.120 45.93940 -129.98704 0.490 -0.00 2 0.12 1A.3 tech 3D waves
    519900121 2025/07/18 15:45:41.540 45.94022 -129.98741 0.351 -0.10 2 0.16 1A.3 tech 3D waves
    519900119 2025/07/18 15:37:7.130 45.92886 -129.97065 0.000 0.00 2 0.18 1A.3 tech 3D waves
    519900118 2025/07/18 15:17:36.300 45.93990 -130.01808 0.818 0.20 1 0.28 1A.3 tech 3D waves
    519900117 2025/07/18 15:17:13.300 45.94078 -130.01440 0.536 0.10 1 0.19 1A.3 tech 3D waves
    519900116 2025/07/18 15:01:23.880 45.95526 -129.99994 1.378 -0.10 2 0.29 1A.3 tech 3D waves
    519900114 2025/07/18 14:57:31.590 45.94225 -130.01572 2.239 0.10 2 0.50 1A.3 tech 3D waves
    519900113 2025/07/18 14:57:23.240 45.94781 -129.99284 0.611 0.30 2 0.87 1A.3 tech 3D waves
    519900112 2025/07/18 14:57:18.870 45.94951 -129.99659 0.345 0.40 2 0.06 1A.3 tech 3D waves
    519900111 2025/07/18 14:48:25.940 45.94093 -130.02063 1.057 1.40 1 0.16 1A.3 tech 3D waves
    519900110 2025/07/18 14:10:16.140 45.95444 -129.95207 1.919 0.20 2 3.57 1A.3 tech 3D waves
    519900108 2025/07/18 13:28:2.320 45.96080 -129.98633 0.743 0.20 2 0.12 1A.3 tech 3D waves
    519900109 2025/07/18 13:28:13.310 45.96056 -129.96768 0.010 0.50 1 0.18 1A.3 tech 3D waves
    519900106 2025/07/18 13:22:30.710 45.94322 -129.99828 0.014 0.10 2 0.17 1A.3 tech 3D waves
    519900105 2025/07/18 13:22:12.860 45.95447 -129.99493 0.843 0.50 1 0.46 1A.3 tech 3D waves
    519900104 2025/07/18 13:21:19.930 45.94869 -129.99567 0.082 0.40 2 0.37 1A.3 tech 3D waves
    519900103 2025/07/18 13:21:0.560 45.95046 -129.99563 0.424 0.80 2 0.13 1A.3 tech 3D waves
    519900102 2025/07/18 13:08:37.600 45.90046 -130.04756 0.501 0.60 2 5.15 1A.3 tech 3D waves
    519900101 2025/07/18 13:02:46.410 45.95916 -129.99746 0.010 0.40 2 0.57 1A.3 tech 3D waves
    519900099 2025/07/18 12:28:39.270 45.91484 -129.97257 2.339 0.20 2 0.84 1A.3 tech 3D waves

    Events last re/processed:
    519900116 2025/07/18 15:01:23.880 45.95526 -129.99994 1.378 -0.10 2 0.29 1A.3 tech 3D waves
    519900117 2025/07/18 15:17:13.300 45.94078 -130.01440 0.536 0.10 1 0.19 1A.3 tech 3D waves
    519900118 2025/07/18 15:17:36.300 45.93990 -130.01808 0.818 0.20 1 0.28 1A.3 tech 3D waves
    519900119 2025/07/18 15:37:7.130 45.92886 -129.97065 0.000 0.00 2 0.18 1A.3 tech 3D waves
    519900121 2025/07/18 15:45:41.540 45.94022 -129.98741 0.351 -0.10 2 0.16 1A.3 tech 3D waves
    519900122 2025/07/18 15:45:48.120 45.93940 -129.98704 0.490 -0.00 2 0.12 1A.3 tech 3D waves
    519900101 2025/07/18 13:02:46.410 45.95916 -129.99746 0.010 0.40 2 0.57 1A.3 tech 3D waves
    519900102 2025/07/18 13:08:37.600 45.90046 -130.04756 0.501 0.60 2 5.15 1A.3 tech 3D waves
    519900103 2025/07/18 13:21:0.560 45.95046 -129.99563 0.424 0.80 2 0.13 1A.3 tech 3D waves
    519900104 2025/07/18 13:21:19.930 45.94869 -129.99567 0.082 0.40 2 0.37 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).