You’ve probably heard about the record flooding that took place in Yellowstone on June 10–13, 2022, but did you ever wonder if the many seismometers in and around Yellowstone recorded that flooding? Learn more:
; one must do some “processing” to actually see the signal from the flooding, as the amplitude is relatively small and is overprinted by the much larger signals from things such as wind, trees, traffic, and background noise. This processing involves filtering the data to emphasize frequencies between 1–1.5 Hz, which is where the flooding signals are most evident.
Station YSB is about 0.3 miles from Soda Butte Creek. Soda Butte Creek is a major tributary of the Lamar River. There is aon the Lamar River just upstream from where it flows into the Yellowstone River. Data from this streamgage show that prior to June 12, the Lamar River was at roughly 8,000–9,000 cubic feet per second and was showing daily increases due to warm daytime temperatures that were increasing the snowmelt to the river.
is actually where the Yellowstone River exits Yellowstone Lake and starts to flow north. Unlike at the Lamar River, the gage at the outlet of Yellowstone Lake recorded a steady increase in discharge with time, although the rate did increase on June 12–13. Overall, the discharge increased by a total of about 1,200 cfs from June 11–16.
So even though we haven’t observed increased seismicity due to the increased amount of water, the seismic network in Yellowstone clearly recorded the signals related to the devastating flooding in the area through the increased “noise” generated by the rivers themselves. And even though we wouldn’t necessarily expect any effects on the seismicity, the increased amount of water could have impacts on the hydrothermal system.
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