BEN FERRAIUOLO
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DLPs and LF Events at Cascade Volcanoes

This page will show all of the plots of the 2 closest seismic stations to each confirmed low frequency tremor, low frequency earthquake, or low frequency DLP. Now if you do not know what a DLP (deep long period) event is, please CLICK HERE. DLPs are commonly thought to be associated with deep magma movement, most likely horizontal movement (however that depends on the process and DLPs are still widely researched). Most of the events listed on this page are confirmed by PNSN's catalog to be low frequency earthquakes. However, if LF activity occurs in WA or OR, and appears to not be quarry or mine blasts, I will post it here anyway even if PNSN does not report it. Most of this activity does occur as normal background seismicity at Cascade volcanoes from time to time, but always monitor an area closely when you see one of these. You never know what may lead to something. It is likely most of these events that occur at ~18km in depth or deeper are considered DLPs.

Please pay attention to all chart labels and any captions you may see. It seems Newberry Caldera in Oregon and Mt. Baker in Washington carry the highest quantity for these LF and/or DLP events. Join me in trying to understand the processes that are taking place under the Cascade Range!

Just a heads up, "PNSN Event ID" is the ID tag PNSN uses for each and every event they report. Some events below were completely removed by PNSN from their catalog. It is strange since, when these events are removed, sometimes they are re-added to the catalog and sometimes they are gone for good. I am unsure why this is. Maybe a database glitch?

Date/Time: February 13, 2019 20:05UTC (12:05pm Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates:  43.706, -121.248
Magnitude: 0.6
Depth: 9.0km
Probably Type: Low frequency earthquake
PNSN Event ID: 61511701
Date/Time: December 23, 2018 3:36UTC (7:36pm Pacific Time, December 22, 2018)
Location: Newberry Caldera, Oregon
Epicenter Coordinates:  43.6872, -121.3182
Magnitude: 1.0
Depth: 8.1km
Probably Type: Low frequency earthquake
PNSN Event ID: 61507641
Date/Time: December 22, 2018 23:44UTC (3:44pm Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.6883, -121.3127
Magnitude: 0.5 (second half of plots shown is stronger)
Depth: 10.5km
Probable Type: Low frequency earthquake (multiple ones?)
PNSN Event ID: 61507631
Date/Time: December 22, 2018 23:43UTC (3:43pm Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.6812, -121.3187
Magnitude: 1.3
Depth: 7.9km
Probable Type: Low frequency earthquake (two of them?)
PNSN Event ID: 61507626
Date/Time: December 13, 2018 10:20UTC (2:20am Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.7342, -121.1888
Magnitude: 1.0
Depth: 1.4km
Probable Type: Low frequency earthquake
PNSN Event ID: 61507107
WARNING: This event was removed by PNSN for reasons unknown.
Date/Time: December 13, 2018 10:17UTC (2:17am Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.7203, -121.2207
Magnitude: 0.9
Depth: -1.1km
Probable Type: Low frequency earthquake 
PNSN Event ID: 61507102
WARNING: This event was removed by PNSN for reasons unknown.
Date/Time: May 1, 2018 20:34UTC (1:34pm Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.6748, -121.2893
Magnitude: 1.2
Depth: 9.3km
Probable Type: Low frequency earthquake
PNSN Event ID: 61383566
Date/Time: May 1, 2018 20:32UTC (1:32pm Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.7215, -121.2400
Magnitude: 1.1
Depth: 6.4km
Probable Type: Low frequency earthquake
PNSN Event ID: 61383561
The plots to the right of this text are from the same day as the two sections above, May 1. During this day, Newberry Caldera saw an increase in low frequency seismicity with a few of the events resembling low frequency tremor along with the LF quakes. There are 6 plots in the slideshow to the right of this text. May 1, 2018 was definitely an interesting day at Newberry.
Date/Time: April 9, 2018 13:48UTC (6:48am Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.6983, -121.2605
Magnitude: 0.5
Depth: 7.7km
Probable Type: Low frequency earthquake
PNSN Event ID: 61378191

Date/Time: April 9, 2018 13:47UTC (6:47am Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: Most likely within 5 miles of the coordinates of the event directly above
Magnitude: Likely to be near the same mag as the event above
Depth: Unknown
Probable Type: Low frequency tremor?
Please Note: This event was NOT reported by a seismologist but was recorded a great distance away. It occurred about 1 minute or so prior to the event shown directly above.
Date/Time: February 24, 2018 9:19UTC (1:19am Pacific Time, same date)
Location: Newberry Caldera, Oregon
Epicenter Coordinates: 43.7148, -121.2953
Magnitude: 1.4
Depth: 9.3km
Probable Type: Low frequency earthquake
PNSN Event ID: 61370261

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  • Home
  • Yellowstone
    • Yellowstone Blog
    • 2008-2009 Yellowstone Lake Dike Intrusion
    • Rapid-Fire Swarms 2014-2018
    • Steamboat Geyser Eruptions >
      • Steamboat Eruptions 2020
      • Steamboat Eruptions 2019
      • Steamboat Eruptions 2018
  • Hawaii
    • Hawaii Blog
    • Hawaii Spasmodic Tremor
    • 2018 Kilauea-LERZ Eruptions
  • How To...
    • ...Retrieve Seismic Data
    • ...read webicorders/helicorders and seismic plots
    • ...Understand Spectrograms
    • ...USE SWARM Software
    • ...use jamaseis program
    • ...use waves program
    • ...understand UTC
    • ...Read/Create GPS Deformation Charts
    • ...use s.w.a.r.m. program (OLD)
  • Seismic Events
    • Event Examples
    • Exotic Events
    • Whale Calls
    • Cascade Volcanoes' Low Frequency Events
  • Seismo-Blog
  • Other Seismic Blogs
    • Quake Swarms
    • United States
    • East Coast, USA
    • World
  • Monthly Volcano Updates
  • Uplift/Subsidence Update
  • Videos/Multimedia
    • Newberry Videos
    • (OLD) 2019 Monthly/Yearly Updates
  • Seismic Software
    • jAmaSeis
    • SWARM
    • WAVES
  • Seismic Network Help
  • Links
  • About Me
  • Contact
  • Test Your Knowledge!
  • Lucas Andrew Ferraiuolo (Pro Pics)
  • Garbage Trucks?!