- 'N Yo' Seismic Network: Marshawn Lynch Shakes the PNSN!
- Swarms in Eastern Washington: are there fewer now than in the past?
- New Algorithm GFAST Enhances the ShakeAlert Earthquake Early Warning System
- Don't Get Scared, Get Prepared!
- Beast Quake (Taylor's Version) (From The Vault)
- Looking at the M3.9 Fall City Earthquake with PNSN.org Tools
- ShakeAlert 2nd Anniversary!
- Pythia's Oasis
- Medford Schools Now Use Earthquake Early Warning Technology - And Yours Could Too!
- Magnitude 4.4 event of Oct 7, 2022
- 2024 3
- 2023 5
- 2022 9
- 2021 16
- 2020 5
- 2019 10
- 2018 11
- 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
17
-
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
- March 2
- February 1
-
December
13
This study was just published in April in BSSA. Here is a map of the faults in the San Juan Islands. The red lines are faults at the surface, the black dots locate earthquakes, and the beach balls indicate focal mechanisms.
Unfortunately, while one can see suggestions in the alignment of hypocenters, focal mechanisms, and surface faults of throughgoing east-west and northwest-southeast faults, it is ambivalent. The seismicity is too sparse and the connection between surface faulting and earthquakes at depth is too tenuous for us to glean the most active through-going structures from this information. Determination of the valuable information of which patches are capable of breaking in major earthquakes is simply not yet possible. Guessing which faults are now loaded and ready to go and which have ruptured too recently to be fully loaded is way beyond our means for now.
This illustrates that for much of the Washington-Oregon region, we have hints of patterns, but the details of the fault locations and mechanisms are not yet clear and require further study and accumulation of more earthquake recordings, and possibly ancillary information such as LIDAR to find the faults and trenching to estimate the record of past earthquakes could also help.