Yellowstone National Park was hit by a mega swarm last year since then
scientists have been analyzing the data and discovered the real reason behind it
last June an earthquake swarm of more than two comma five thousand tremors
over three months was recorded at Yellowstone National Park they are a
regular occurrence at the American National Park where the swarms make up
about 50% of seismic activity just last month another swarm was monitored in the
exact same area as the 2017 activity a total of 126 earthquakes were recorded
in November the 2017 mega swarm was the biggest and longest swarm on record and
only came to an end at the start of October after beginning in June however
the reason these swarms happen in the first place has been analyzed by experts
and the reason they occur has been revealed david shelley seismologist of
the United States Geological Society USGS wrote a blog post about what they
had found in the Yellowstone Caldera chronicles the seismic network in the
Yellowstone National Park has been upgraded so the swarm could be analyzed
in further detail experts could precisely locate each tremor and allow
them to create a map where each earthquake occurred and show how the
swarm had moved he wrote the patterns of seismicity from the swarm in time and
space that have been revealed from this processing are striking the swarm
involved numerous full structures over its course many of these faults are
parallel and oriented along east-northeast trends but some faults
with orientations that are nearly perpendicular to that trends were also
activated over the three months of the swam seismicity migrated outward from
its initial activation area both laterally and in depth at times this
migration was rapid at other times it was slow Shirley said this movement did
not match up with a movement of magma but instead it appears the swarm was
caused by water diffusing through small cracks in the sub
he added because this water is under great pressure in the deep crust where
it is released it tends to migrate upward and sometimes laterally when it
interacts with cooler more brittle rocks stressed by tectonic and volcanic
processes this water may trigger earthquakes in fact earthquakes
themselves may allow the fluid to migrate more efficiently through faults
in the rock however he disputed that the 2000 Yellowstone National Park was hit
by a mega swarm last year since then scientists have been analyzing the data
and discovered the real reason behind it last June
an earthquake swarm of more than two comma five thousand tremors over three
months was recorded at Yellowstone National Park they are a regular
occurrence at the American National Park where the swarms make up about 50% of
seismic activity just last month another swarm was monitored in the exact same
area as the 2017 activity a total of 126 earthquakes were recorded in November
the 2017 mega swarm was the biggest and longest swarm on record and only came to
an end at the start of October after beginning in June however the reason
these swarms happen in the first place has been analyzed by experts and the
reason they occur has been revealed David Shelley seismologist of the United
States Geological Society USGS wrote a blog post about what they had found in
the Yellowstone Caldera chronicles the seismic network in the Yellowstone
National Park has been upgraded so the swarm could be analyzed in further
detail experts could precisely locate each tremor and allow them to create a
map where each earthquake occurred and show how the swarm had moved he wrote
the patterns of seismicity from the swarm in time and space that have been
revealed from this processing are striking the swarm involved numerous
full structures over its course many of these faults are parallel and oriented
along east-northeast trends but some faults with orientations that are nearly
perpend Killa to that trends were also activated
over the three months of the swam seismicity migrated outward from its
initial activation area both laterally and in depth at times this migration was
rapid at other times it was slow Shelley said this movement did not match up with
a movement of magma but instead it appears the swarm was caused by water
diffusing through small cracks in the subsurface he added because this water
is under great pressure in the deep crust where it is released it tends to
migrate upward and sometimes laterally when it interacts with cooler more
brittle rocks stressed by tectonic and volcanic processes this water may
trigger earthquakes in fact earthquakes themselves may allow the fluid to
migrate more efficiently through faults in the rock however he disputed that the
2017 swarm could highlight an increased risk of eruption even though the mega
swarm was larger than average the swarm happened on its own without signs of
unrest like surface defamation or changes to gas emissions so there is no
added risk of the eruption
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