- St Helens 40th Anniversary Program
- Getting ready for the next Great Cascadia Subduction Zone Earthquake
- Small earthquakes near Fall City
- SoundersFC Soccer Shake Experiment
- The Hills are Alive with the Sound of … Earthquakes?
- Ml=4.6 Monroe Earthquake of July 12, 2019
- Typical Mount Hood Earthquake Swarm
- An updated tremor monitoring system
- OOPS - Correction to last post
- When is an ETS just T
- 2020 2
- 2019 10
- 2018 12
- 2017 10
- 2016 16
- 2015 11
- 2014 16
- 2013 14
-
2012
48
- December 1
- November 2
- October 3
- September 1
- August 3
- July 2
- June 4
- May 4
- April 2
-
March
8
- The wech-o-meter takes over all of Cascadia
- Keystone Cops: Italy prosecutes seismologists for failure to predict deadly quake
- UFOs in eastern Washington? No, rather UTEs (Unidentified Terrestrial Events)
- New Sodo Seattle Liquefaction Array Installed
- Why we should constantly watch the deformation of the seafloor
- Mystery chirp near Newberry Volcano
- Planting seismographs causes earthquakes? or maybe ice-quakes?
- Tunneling rumbles south under Capitol Hill
-
February
7
- 15 years of mostly silent magma inflation near Three Sisters, Oregon
- Mount Hood earthquake swarm of Feb 23, 2012
- Web glitches: duplicate (and even triplicate!) earthquakes
- How earthquake magnitude scales work
- Mine blast masquerades as volcanic tremor
- The Spokane Swarm about 10 years ago
- Another hum around Mount St. Helens
-
January
11
- Slow slip: A new kind of earthquake under our feet
- PNSN and social media
- 3am M3.4 earthquake in St. Helens Seismic Zone
- The wrong kind of volcano noise
- Fast chatter on Rainier an hour ago
- Can slush-mageddon trigger earthquakes?
- Rainier Repeating Earthquakes Update and Comparison with Weather Patterns
- 22-minutes drumbeat icequakes(?)
- Mount Rainier popping away
- Repeating Earthquakes on Mount Rainier - are glaciers the culprit?
- Debunking another SEC football myth by the PAC-12
-
2011
14
-
December
13
- One year ago, Seattle Seahawks 12th Man Earthquake
- The odds this year of a megaquake on the Pacific Northwest coast
- Is the plague of great earthquakes this decade a sign of increased danger?
- Nile Valley landslide talks to PNSN seismologists
- Good vs evil in central US earthquake hazard analysis
- Why does a volcano scream?
- Predicting big quakes from patterns of little ones
- 1-hour warning for Japanese M9 earthquake?
- Sound Transit train under Interlaken keeps a rollin'
- Invisible changes under the hood at the PNSN
- Sound Transit Tunneling Noise
- "Visionary" toads
- Earthquake early warning in the PNW
- November 1
-
December
13
Did people also feel what our instrument saw? After taking the weekend off, noise restarted midday Monday.
Our strong motion sensor below Interlaken Park continues to record shaking. The seismograms that are triggered are posted here. The times of the shaking yesterday and early this morning are 11:58am, 2:02pm, 2:47pm, 4:34pm, 4:49pm, 9:40pm, and 12:37am. (Pacific Standard Time, PST, is UTC minus 8 hours.)
For example, this jolt at 12:37am (8:37 UTC), just after midnight, peaked with a burst of 0.5% g vertical shaking. The vibration built for 30 seconds beforehand, and continued for 10-20 seconds afterwards.
John and Paul are heading to the big annual geophysics meeting in San Francisco this afternoon, but endless lectures are a good time to keep an eye on PNSN activity!