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


Last updated on Fri Nov 14 02:56:14 UTC 2025 ( Thu Nov 13 21:56:14 EST 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
    531700410 2025/11/13 23:40:39.750 45.94355 -130.03780 0.890 0.20 2 1.75 1A.3 tech 3D waves
    531700407 2025/11/13 14:33:16.230 45.92427 -129.95963 0.783 0.40 1 0.18 1A.3 tech 3D waves
    531700405 2025/11/13 14:31:42.100 45.93526 -129.97841 1.365 -0.10 1 0.09 1A.3 tech 3D waves
    531700397 2025/11/13 14:09:45.870 45.94572 -130.01302 0.251 1.30 1 0.23 1A.3 tech 3D waves
    531700393 2025/11/13 14:04:35.810 45.93405 -129.98015 1.319 0.20 1 0.35 1A.3 tech 3D waves
    531700391 2025/11/13 14:03:19.640 45.94634 -129.94117 0.124 0.50 2 0.81 1A.3 tech 3D waves
    531700388 2025/11/13 14:00:11.100 45.93246 -129.97044 0.010 0.50 2 0.17 1A.3 tech 3D waves
    531700381 2025/11/13 13:45:48.800 45.93319 -129.97983 1.517 0.10 1 0.31 1A.3 tech 3D waves
    531700380 2025/11/13 13:45:26.440 45.93358 -129.97645 1.473 0.40 1 0.25 1A.3 tech 3D waves
    531700378 2025/11/13 13:44:16.340 45.93403 -129.97732 1.468 0.20 1 0.26 1A.3 tech 3D waves
    531700374 2025/11/13 13:35:10.640 45.94911 -129.99879 0.010 1.00 2 0.81 1A.3 tech 3D waves
    531700373 2025/11/13 13:34:14.800 45.93392 -129.97795 1.505 0.60 1 0.48 1A.3 tech 3D waves
    531700372 2025/11/13 13:33:48.790 45.93365 -129.97817 1.410 1.00 1 0.31 1A.3 tech 3D waves
    531700369 2025/11/13 13:28:37.910 45.93299 -129.97976 1.343 0.10 2 0.68 1A.3 tech 3D waves
    531700364 2025/11/13 13:22:58.680 45.93231 -129.98071 1.101 0.40 2 0.78 1A.3 tech 3D waves
    531700362 2025/11/13 13:17:41.960 45.93228 -129.97491 1.470 0.10 2 0.28 1A.3 tech 3D waves
    531700361 2025/11/13 13:13:12.840 45.93331 -129.97729 1.373 -0.00 1 0.12 1A.3 tech 3D waves
    531700359 2025/11/13 13:06:51.450 45.95577 -129.99184 1.212 0.30 2 1.91 1A.3 tech 3D waves
    531700358 2025/11/13 13:06:32.080 45.93180 -129.97440 1.400 0.10 - - 1A.0 tech 3D waves
    531700355 2025/11/13 13:05:43.440 45.92894 -129.90583 0.000 0.80 2 0.64 1A.3 tech 3D waves

    Events last re/processed:
    531700410 2025/11/13 23:40:39.750 45.94355 -130.03780 0.890 0.20 2 1.75 1A.3 tech 3D waves
    531700355 2025/11/13 13:05:43.440 45.92894 -129.90583 0.000 0.80 2 0.64 1A.3 tech 3D waves
    531700358 2025/11/13 13:06:32.080 45.93180 -129.97440 1.400 0.10 - - 1A.0 tech 3D waves
    531700359 2025/11/13 13:06:51.450 45.95577 -129.99184 1.212 0.30 2 1.91 1A.3 tech 3D waves
    531700361 2025/11/13 13:13:12.840 45.93331 -129.97729 1.373 -0.00 1 0.12 1A.3 tech 3D waves
    531700362 2025/11/13 13:17:41.960 45.93228 -129.97491 1.470 0.10 2 0.28 1A.3 tech 3D waves
    531700364 2025/11/13 13:22:58.680 45.93231 -129.98071 1.101 0.40 2 0.78 1A.3 tech 3D waves
    531700369 2025/11/13 13:28:37.910 45.93299 -129.97976 1.343 0.10 2 0.68 1A.3 tech 3D waves
    531700372 2025/11/13 13:33:48.790 45.93365 -129.97817 1.410 1.00 1 0.31 1A.3 tech 3D waves
    531700373 2025/11/13 13:34:14.800 45.93392 -129.97795 1.505 0.60 1 0.48 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).