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?
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?
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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 |
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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 |
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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 |
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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 |
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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. |
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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. |
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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 |
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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 |
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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.
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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 |
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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. |
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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 |