Horrible today: 3nd Eruption of Yellowstone Giant Geyser Recorded Live, Spews Lots Trash In Air

Horrible today: 3nd Eruption of Yellowstone Giant Geyser Recorded Live, Spews Lots Trash In Air

Data continues to provide a better understanding of the national park’s volcanic, earthquake and hydrothermal behavior, writes guest columnist Michael Poland. Since 2017, the Yellowstone Volcano Observatory has produced an annual report that’s packed with information on a variety of topics — ground deformation trends, earthquake activity and improvements to its monitoring network, for example. It also includes information on research findings and new discoveries, such as the recognition of a new thermal area near Tern Lake in 2018 .

The Yellowstone Volcano Observatory’s 2022 annual report has just been released and is now available online . As in previous years, this summary highlights the monitoring data collected throughout the year. For example, 2,429 earthquakes occurred in the Yellowstone region in 2022, the largest of which was a magnitude 4.2 quake on May 11 — the strongest quake in the region since a magnitude 4.4 quake in 2017. The number of earthquakes was within the typical annual range and slightly fewer than in 2021.

About 66% of the earthquakes occurred as earthquake clusters , which are groups of earthquakes that are clustered in space and time. The most significant earthquake cluster, which had more than 1,100 earthquakes and lasted for the second half of the year, occurred near Grizzly Lake, between Mammoth Hot Springs and the Norris Geyser Basin. Earthquake clusters with hundreds to thousands of events and lasting for months are not uncommon in the Yellowstone region, occurring every few years.

As has been the trend since 2015, the Yellowstone Caldera has been subsidence--1-2 inches--all year long, interrupted during the summer months by lulls in subsidence or slight uplift as the ground swells slightly due to groundwater recharge from snowmelt. Little significant deformation has been detected in the Norris Geyser Basin area since 2018. Speaking of water, there was a lot of it in Yellowstone in 2022 — an atmospheric river event in mid-June dumped several inches of rain on top of a late-season snowpack.

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