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


Last updated on Tue May 20 15:48:41 UTC 2025 ( Tue May 20 11:48:41 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
    514000114 2025/05/20 14:59:26.150 45.96167 -129.99524 1.520 0.10 2 0.20 1A.3 tech 3D waves
    514000113 2025/05/20 14:58:26.620 45.96114 -129.99634 1.424 0.10 2 0.42 1A.3 tech 3D waves
    514000112 2025/05/20 14:58:18.410 45.97403 -130.02474 0.111 0.40 2 3.05 1A.3 tech 3D waves
    514000110 2025/05/20 14:52:29.840 45.94518 -130.02095 0.951 0.20 2 0.57 1A.3 tech 3D waves
    514000109 2025/05/20 14:52:17.210 45.94528 -130.01550 0.582 0.10 2 0.02 1A.3 tech 3D waves
    514000108 2025/05/20 14:22:52.460 45.93691 -130.01952 1.151 0.10 1 0.16 1A.3 tech 3D waves
    514000107 2025/05/20 14:11:20.730 45.93480 -129.98388 1.282 0.10 2 0.04 1A.3 tech 3D waves
    514000104 2025/05/20 13:35:48.150 45.92513 -129.99727 0.963 -0.20 2 0.07 1A.3 tech 3D waves
    514000103 2025/05/20 13:25:33.130 45.91894 -129.97651 0.938 0.20 2 0.86 1A.3 tech 3D waves
    514000102 2025/05/20 13:10:3.410 45.93295 -129.99937 0.481 -0.10 2 0.35 1A.3 tech 3D waves
    514000101 2025/05/20 13:05:13.280 45.93975 -129.98834 0.239 0.10 2 0.04 1A.3 tech 3D waves
    514000100 2025/05/20 13:04:32.190 45.93713 -130.01748 0.813 0.10 1 0.39 1A.3 tech 3D waves
    514000098 2025/05/20 12:51:43.820 45.93738 -130.01840 0.911 0.50 2 0.24 1A.3 tech 3D waves
    514000097 2025/05/20 12:51:36.000 45.93793 -130.01669 0.845 0.60 1 0.25 1A.3 tech 3D waves
    514000096 2025/05/20 12:45:52.190 45.93764 -130.01790 0.914 1.10 2 0.23 1A.3 tech 3D waves
    514000095 2025/05/20 12:41:24.340 45.93783 -129.98713 0.686 0.10 1 0.14 1A.3 tech 3D waves
    514000094 2025/05/20 12:28:12.740 45.94651 -130.01147 0.146 1.50 1 0.18 1A.3 tech 3D waves
    514000093 2025/05/20 12:14:50.090 45.93481 -130.00113 0.010 -0.10 2 0.33 1A.3 tech 3D waves
    514000092 2025/05/20 12:03:18.530 45.93560 -130.01705 0.789 0.10 2 0.19 1A.3 tech 3D waves
    514000091 2025/05/20 11:45:42.830 45.92367 -129.96771 1.086 0.30 2 0.85 1A.3 tech 3D waves

    Events last re/processed:
    514000107 2025/05/20 14:11:20.730 45.93480 -129.98388 1.282 0.10 2 0.04 1A.3 tech 3D waves
    514000108 2025/05/20 14:22:52.460 45.93691 -130.01952 1.151 0.10 1 0.16 1A.3 tech 3D waves
    514000109 2025/05/20 14:52:17.210 45.94528 -130.01550 0.582 0.10 2 0.02 1A.3 tech 3D waves
    514000110 2025/05/20 14:52:29.840 45.94518 -130.02095 0.951 0.20 2 0.57 1A.3 tech 3D waves
    514000112 2025/05/20 14:58:18.410 45.97403 -130.02474 0.111 0.40 2 3.05 1A.3 tech 3D waves
    514000113 2025/05/20 14:58:26.620 45.96114 -129.99634 1.424 0.10 2 0.42 1A.3 tech 3D waves
    514000114 2025/05/20 14:59:26.150 45.96167 -129.99524 1.520 0.10 2 0.20 1A.3 tech 3D waves
    514000100 2025/05/20 13:04:32.190 45.93713 -130.01748 0.813 0.10 1 0.39 1A.3 tech 3D waves
    514000101 2025/05/20 13:05:13.280 45.93975 -129.98834 0.239 0.10 2 0.04 1A.3 tech 3D waves
    514000102 2025/05/20 13:10:3.410 45.93295 -129.99937 0.481 -0.10 2 0.35 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).