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

Last updated on Sat Sep 27 09:03:03 UTC 2025 ( Sat Sep 27 05:03:03 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
    527000078 2025/09/27 07:54:31.290 45.95062 -130.01381 0.110 0.40 2 0.74 1A.3 tech 3D waves
    527000077 2025/09/27 07:53:5.530 45.97468 -130.00058 2.189 0.50 2 0.56 1A.3 tech 3D waves
    527000076 2025/09/27 07:42:8.860 45.94035 -130.01322 0.715 -0.30 2 0.13 1A.3 tech 3D waves
    527000075 2025/09/27 07:41:54.160 45.97122 -130.00199 1.826 -0.20 2 1.11 1A.3 tech 3D waves
    527000074 2025/09/27 07:39:23.970 45.92831 -129.98308 1.366 0.20 2 1.30 1A.3 tech 3D waves
    527000072 2025/09/27 07:35:5.560 45.92340 -129.98457 1.646 0.30 2 0.21 1A.3 tech 3D waves
    527000073 2025/09/27 07:35:50.760 45.93626 -130.01894 1.251 0.40 2 0.25 1A.3 tech 3D waves
    527000069 2025/09/27 07:26:38.550 45.94899 -130.02461 0.790 0.20 1 0.79 1A.3 tech 3D waves
    527000068 2025/09/27 07:23:55.410 45.93794 -130.01568 0.810 0.50 2 0.35 1A.3 tech 3D waves
    527000067 2025/09/27 07:20:37.100 45.97161 -129.99985 1.988 0.30 2 0.52 1A.3 tech 3D waves
    527000066 2025/09/27 07:19:18.920 45.95136 -129.99557 0.607 0.10 1 0.07 1A.3 tech 3D waves
    527000065 2025/09/27 07:17:0.460 45.94777 -129.99225 0.474 -0.10 2 0.31 1A.3 tech 3D waves
    527000063 2025/09/27 07:09:11.350 45.96206 -129.99830 0.591 0.20 2 0.23 1A.3 tech 3D waves
    527000061 2025/09/27 06:58:15.690 45.94714 -129.99274 0.235 0.00 1 0.26 1A.3 tech 3D waves
    527000060 2025/09/27 06:55:16.370 45.95312 -129.98770 1.618 0.20 1 0.12 1A.3 tech 3D waves
    527000059 2025/09/27 06:42:8.090 45.92910 -130.00360 1.280 0.00 - - 1A.0 tech 3D waves
    527000058 2025/09/27 06:36:27.920 45.95151 -129.99767 0.822 -0.20 2 0.31 1A.3 tech 3D waves
    527000057 2025/09/27 06:35:37.090 45.92276 -129.99591 4.194 0.40 2 2.55 1A.3 tech 3D waves
    527000055 2025/09/27 06:34:49.620 45.97622 -129.99177 4.294 -0.30 2 4.75 1A.3 tech 3D waves
    527000054 2025/09/27 06:27:45.970 45.92763 -129.98077 0.907 -0.10 2 0.10 1A.3 tech 3D waves

    Events last re/processed:
    527000063 2025/09/27 07:09:11.350 45.96206 -129.99830 0.591 0.20 2 0.23 1A.3 tech 3D waves
    527000065 2025/09/27 07:17:0.460 45.94777 -129.99225 0.474 -0.10 2 0.31 1A.3 tech 3D waves
    527000066 2025/09/27 07:19:18.920 45.95136 -129.99557 0.607 0.10 1 0.07 1A.3 tech 3D waves
    527000067 2025/09/27 07:20:37.100 45.97161 -129.99985 1.988 0.30 2 0.52 1A.3 tech 3D waves
    527000068 2025/09/27 07:23:55.410 45.93794 -130.01568 0.810 0.50 2 0.35 1A.3 tech 3D waves
    527000069 2025/09/27 07:26:38.550 45.94899 -130.02461 0.790 0.20 1 0.79 1A.3 tech 3D waves
    527000072 2025/09/27 07:35:5.560 45.92340 -129.98457 1.646 0.30 2 0.21 1A.3 tech 3D waves
    527000073 2025/09/27 07:35:50.760 45.93626 -130.01894 1.251 0.40 2 0.25 1A.3 tech 3D waves
    527000074 2025/09/27 07:39:23.970 45.92831 -129.98308 1.366 0.20 2 1.30 1A.3 tech 3D waves
    527000075 2025/09/27 07:41:54.160 45.97122 -130.00199 1.826 -0.20 2 1.11 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).