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


Last updated on Sat Apr 26 03:50:18 UTC 2025 ( Fri Apr 25 23:50:18 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
    511600016 2025/04/26 00:45:15.540 45.94627 -129.99554 0.020 0.40 2 0.17 1A.3 tech 3D waves
    511600015 2025/04/26 00:44:47.530 45.94967 -129.99786 0.106 0.40 1 0.18 1A.3 tech 3D waves
    511600014 2025/04/26 00:44:42.440 45.96325 -129.99843 2.018 0.70 1 0.20 1A.3 tech 3D waves
    511600013 2025/04/26 00:44:25.480 45.94987 -129.99751 0.178 1.50 2 0.28 1A.3 tech 3D waves
    511600012 2025/04/26 00:38:13.450 45.94176 -130.02498 0.895 -0.20 2 0.93 1A.3 tech 3D waves
    511600011 2025/04/26 00:34:54.970 45.94532 -130.02371 0.618 0.20 2 1.46 1A.3 tech 3D waves
    511600010 2025/04/26 00:29:33.350 45.94624 -130.01838 0.538 0.20 1 0.12 1A.3 tech 3D waves
    511600009 2025/04/26 00:26:28.420 45.94888 -130.00094 0.010 0.20 1 0.26 1A.3 tech 3D waves
    511600007 2025/04/26 00:14:23.370 45.94447 -129.95695 0.078 0.40 2 0.19 1A.3 tech 3D waves
    511600004 2025/04/26 00:12:4.180 45.94697 -129.99083 0.405 -0.20 2 0.12 1A.3 tech 3D waves
    511600005 2025/04/26 00:12:26.010 45.94727 -129.99106 0.468 -0.20 2 0.09 1A.3 tech 3D waves
    511600003 2025/04/26 00:11:47.310 45.94813 -129.99336 0.372 0.00 1 0.04 1A.3 tech 3D waves
    511600002 2025/04/26 00:11:30.610 45.94723 -129.99132 0.450 0.10 2 0.63 1A.3 tech 3D waves
    511600001 2025/04/26 00:11:25.690 45.95313 -129.98537 1.576 0.10 2 0.30 1A.3 tech 3D waves
    511600000 2025/04/26 00:02:8.020 45.92648 -130.00487 0.673 0.10 2 0.17 1A.3 tech 3D waves
    511500324 2025/04/25 23:57:20.740 45.94397 -129.98847 0.427 -0.10 1 0.32 1A.3 tech 3D waves
    511500323 2025/04/25 23:51:53.270 45.97945 -130.08158 0.796 0.70 2 5.78 1A.3 tech 3D waves
    511500322 2025/04/25 23:51:44.640 45.91925 -129.99694 0.167 0.20 2 4.01 1A.3 tech 3D waves
    511500321 2025/04/25 23:49:4.900 45.92636 -130.00479 0.730 0.20 2 0.33 1A.3 tech 3D waves
    511500320 2025/04/25 23:44:44.450 45.94588 -130.03978 0.010 0.30 2 1.49 1A.3 tech 3D waves

    Events last re/processed:
    511600000 2025/04/26 00:02:8.020 45.92648 -130.00487 0.673 0.10 2 0.17 1A.3 tech 3D waves
    511600001 2025/04/26 00:11:25.690 45.95313 -129.98537 1.576 0.10 2 0.30 1A.3 tech 3D waves
    511600002 2025/04/26 00:11:30.610 45.94723 -129.99132 0.450 0.10 2 0.63 1A.3 tech 3D waves
    511600003 2025/04/26 00:11:47.310 45.94813 -129.99336 0.372 0.00 1 0.04 1A.3 tech 3D waves
    511600004 2025/04/26 00:12:4.180 45.94697 -129.99083 0.405 -0.20 2 0.12 1A.3 tech 3D waves
    511600005 2025/04/26 00:12:26.010 45.94727 -129.99106 0.468 -0.20 2 0.09 1A.3 tech 3D waves
    511600007 2025/04/26 00:14:23.370 45.94447 -129.95695 0.078 0.40 2 0.19 1A.3 tech 3D waves
    511600009 2025/04/26 00:26:28.420 45.94888 -130.00094 0.010 0.20 1 0.26 1A.3 tech 3D waves
    511600010 2025/04/26 00:29:33.350 45.94624 -130.01838 0.538 0.20 1 0.12 1A.3 tech 3D waves
    511600011 2025/04/26 00:34:54.970 45.94532 -130.02371 0.618 0.20 2 1.46 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).