Yellowstone Caldera



Information on Yellowstone Caldera

Elevation: 10,308 ft (3,142 m) at Mount Sheridan

Location: Yellowstone National Park, Wyoming, USA

Range: Rocky Mountains

Coordinates: 44°24?N 110°42?W

Last Eruption: 1350 BCE +/- 200 years

Type: Caldera and SuperVolcanco

Yellowstone Monthly Update

Saturday, July 1, 2017

 Current Volcano Alert Level: NORMAL

 Current Aviation Color Code: GREEN

Webcams of Yellowstone

Yellowstone Maps - Image Gallery

Nature Runs Amuk At Yellowstone


Earthquakes - Recent & Map -& Map of Yellowstone Faults & Monitoring with Map & Listings

Monitoring Stations Lists & Map of Stations

Yellowstone Caldera Geology-History

Yellowstone Caldera -

From Wikipedia, the free encyclopedia

The Yellowstone Caldera is the volcanic caldera and supervolcano located in Yellowstone National Park in the United States, sometimes referred to as the Yellowstone Supervolcano. The caldera is located in the northwest corner of Wyoming, in which the vast majority of the park is contained. The major features of the caldera measure about 34 by 45 miles (55 by 72 km).[3] The caldera formed during the last of three supereruptions over the past 2.1 million years. First came the Huckleberry Ridge eruption 2.1 million years ago, which created the Island Park Caldera and the Huckleberry Ridge Tuff. Next came the Mesa Falls eruption 1.3 million years ago, which created the Henry's Fork Caldera and the Mesa Falls Tuff. Finally came the Lava Creek eruption 640,000 years ago, which created the Yellowstone Caldera and the Lava Creek Tuff.

Yellowstone Caldera - more detailed information here

The 2003 bulge beneath Yellowstone Lake

Articles in the press in 2003 reported a "bulge" beneath Yellowstone Lake and have generated some concern about possible dangers for residents or visitors to the area. We answer some questions we've been asked by the public and press. Click Here for USGS site

Yellowstone Supervolcano - reference website:

 Yellowstone Topography Map - Arial View


Yellowstone Spawned Twin Super-Eruptions that Altered Global Climate

Boulder, CO, USA: A new geological record of the Yellowstone supervolcano's last catastrophic eruption is rewriting the story of what happened 630,000 years ago and how it affected Earth's climate. This eruption formed the vast Yellowstone caldera observed today, the second largest on Earth.

Two layers of volcanic ash bearing the unique chemical fingerprint of Yellowstone's most recent super eruption have been found in seafloor sediments in the Santa Barbara Basin, off the coast of Southern California. These layers of ash, or tephra, are sandwiched among sediments that contain a remarkably detailed record of ocean and climate change. Together, both the ash and sediments reveal that the last eruption was not a single event, but two closely spaced eruptions that tapped the brakes on a natural global-warming trend that eventually led the planet out of a major ice age.


NASA may accidentally set off the Yellowstone supervolcano in a risky effort to prevent it from blowing

Monday, August 21, 2017 by: Jhoanna Robinson


(Natural News) Scientists at National Aeronautics and Space Administration (NASA) may have come up with an unconventional plan to save the United States from the supposed explosion of the allegedly newly active volcano at the Yellowstone National Park.

Lying underneath the Yellowstone National Park is a huge magma chamber called a caldera, which is responsible for making geysers and hot springs hot. It erupts every 600,000 years and is home to scenic spots such as 10,000 hot springs, mud pots, and geysers, including the cone geyser called Old Faithful.

NASA Advisory Council on Planetary Defense former member Brian Wilcox shared a recent report regarding the recently-active caldera, noting, “I was a member of the NASA Advisory Council on Planetary Defense which studied ways for NASA to defend the planet from asteroids and comets. I came to the conclusion during that study that the supervolcano threat is substantially greater than the asteoid or comet threat.”

Read the full article...they want to drill and inject water!!!


Yellowstone Current Alerts: Sept. 5, 2017

Yellowstone Earthquake Swarm 2017


The earthquake swarm list for June 12th to Sept. 5th  of 2556


Mag of 0.1 to no limit max: 2441 Earthquakes as of August 23, 2017.


A cluster of earthquakes at the Yellowstone Park volcano is the most active it’s been in recent history. The earthquake count is up to 2,357 since June with the largest having a magnitude of  4.4. The majority of the earthquakes were magnitudes of 0 or 1,


Yet scientists are assuring the public that a swarm of earthquakes doesn’t necessarily signal an eruption of the super volcano. But when the type of earthquakes occurring in Yellowstone deviates from the standard, it could mean that an eruption is forthcoming. A swarm of earthquakes is rather normal for Yellowstone, but the number of quakes is approaching a new record.


The current swarm is approaching the record set in 1985 when three months brought over 3,000 earthquakes. In 2010 a swarm brought over 2,000 earthquakes over a month. If Yellowstone erupts, it’s most likely to be a lava flow, as occurred in nearly all the 80 eruptions since the last ‘supereruption’ 640,000 years ago.


View the daily seismic graphs here:



August 15th


There have been 2321 earthquakes in the range of .01 mag and higher since June 12th.  The latest quake of 3.2 mag occurring on 08-15-17 at 14km NNE of West Yellowstone at a depth of 8.6km.


August 3rd

On this one day alone Yellowstone had 8 quakes in the 2.0+ range.  The seismic thumbs for today will not load.Yellowstone Nat. Park, Wyoming has had: (M1.5 or greater)


Yellowstone Earthquake Swarm 2017


The earthquakes listed for June 12th to July 15th  of 2252


Mag of 0.1 to no limit max:  12452 Earthquakes as of July 15, 2017


July 13th, 2017

The number of earthquakes in the current swarm in the north-west corner of Yellowstone has risen to 1247 as of July 13th, 2017.

Another 2.2 earthquake struck at 16 km NNE of West Yellowstone at 17:32:33 (UTC) at a depth of 5.3 km.


Seismicity            July 1, 2017

During June 2017, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 1171 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a light earthquake of magnitude 4.4 on June 16, at 06:48 PM MDT, located about nine miles north northwest of West Yellowstone, MT. The earthquake was reported felt in the towns of Gardiner and West Yellowstone, MT. This earthquake is part of an energetic sequence of earthquakes in the same area that began on June 12.

June seismicity in Yellowstone was marked by four distinct clusters of episodic earthquakes:

1) An energetic swarm of 1027 earthquakes, ~six miles north of West Yellowstone, MT, began June 12 and is ongoing, including the largest event of the month on June 16 (magnitude 4.4). This swarm also consists of five earthquakes in the magnitude 3 range and 72 earthquakes in the magnitude 2 range.

2) 41 events occurred in a small swarm ~14 miles east northeast of West Yellowstone, MT, with swarm activity occurring June 14 and 15. The largest earthquake of the swarm (magnitude 2.3) occurred June 14, at 07:39 AM MDT ~14 miles east northeast of West Yellowstone, MT. This swarm includes two earthquakes in the magnitude 2 range.

3) A small swarm of 22 earthquakes, ~14 miles south southwest of Mammoth, WY, took place on June 1 and 2 (UTC), with the largest event (magnitude 2.6) occurring June 1, at 08:29 PM MDT. This swarm includes 3 earthquakes in the magnitude 2 range.

4) A small swarm of 13 earthquakes, ~16 miles east northeast of West Yellowstone, MT, occurred June 13. The largest earthquake (magnitude 1.7) occurred June 13, at 07:14 AM MDT ~16 miles east northeast of West Yellowstone, MT.

Earthquake sequences like these are common and account for roughly 50% of the total seismicity in the Yellowstone region.

Yellowstone earthquake activity is currently at elevated levels compared with typical background activity.


Yellowstone – Ground Deformation


Here’s a quick look at the last two years of ground movement at Yellowstone. The rings of color in this InSAR ( image record the change in elevation of the ground with respect to a radar satellite. USGS geophysicist Chuck Wicks made the image by comparing data from June 2015 and July 2017. There is a bulls-eye shaped uplift (7 cm or a bit less than 3 in.) centered on the Norris Geyser Basin, and an elliptical subsidence (i.e., downdropping of 3 cm or 1.2 in.) within the Yellowstone caldera. The summer 2017 earthquake swarm is taking place 20-30 km west of the Norris uplift.

The uplift and subsidence is usually interpreted as due to addition or withdrawal of deep magma and related gases and water at depths 5 to 15 km (3 to 9 mi.) beneath the ground surface. This cycle of uplift and subsidence is common and seems tied to earthquake swarms (; that is, swarms appear to release the pressure that caused the initial uplift… thus allowing the region to return to a period of subsidence. You can read a detailed summary of an earlier uplift near Norris on the YVO website( To learn about the rates of deformation within the two-year period, we rely on data from the Yellowstone GPS network.

This “interferogram” was made with data from the European Space Agency Sentinel 1a satellite. Roads are yellow. Faults are thin black lines.


Hot Spot: Yellowstone Road Melts, Sites Closed - CHEYENNE, Wyo. - Jul 10, 2014, 4:12 PM ET The ever-changing thermal geology of Yellowstone National Park has created a hot spot that melted an asphalt road and closed access to popular geysers and other attractions at the height of tourist season, officials said Thursday. The damage to Firehole Lake Drive is unusually severe and could take several days to fix. The 3.3-mile loop six miles north of Old Faithful takes visitors past Great Fountain Geyser, White Dome Geyser and Firehole Lake.

ALERT: Yellowstone Proof Monitors Not Working - Hugh Gases Being Released - YouTube: Maty Greeley follow her here to keep updated.

Yellowstone Supervolcano: Gas Levels Higher Then Ever ... Published on Jul 6, 2014 YouTube

More developments are taking place at the Yellowstone Super Volcano. The kind of developments that were seen shortly before other volcanic eruptions. There has been a rise in the ground under Yellowstone lake. Readings of very large amounts of gases called Hydrogen Sulphide and Sulpher Dioxide are being detected. When these gases were detected at other volcanoes, it appeared shortly before major eruptions of those volcanoes.

Yellowstone Recording Helium-4-Known To Appear Before Large Eruptions

Has US Hired An "Iceland" Company to Drill Yellowstone For A Controlled Eruption?

Breaking! Yellowstone's Geysers Erupting! Just Released Video...

* Fracking In YELLOWSTONE Airplane's VIEW JUST Released Video of Caldera's Vents Exploding Be Prepared ­ Be VERY Prepared ­ After YOU See This ­ You Will Want to Be Prepared

ALERT: USGS Suppressing Supervolcano Activity At Yellowstone - watch here Mary Greeley News site

Yellowstone eruption: Report claims that US has contingency deal with Brazil, Australia to move millions of Americans

Yellowstone Supervolcano Ground Raises Ten Inches Video shot in 2011 - info still relevant.

3/29/2014 Yellowstone Supervolcano Update

4/16/2014 -- Yellowstone Unrest -- USGS installs new seismographs

Is Yellowstone about to erupt phone call with an employee at Yellowstone

Yellowstone Earthquake Swarms - More seismic unrest reported at Yellowstone: Seismographs have picked up a swarm of earthquakes in the northwestern corner of Yellowstone National Park, including dozens early Tuesday. The University of Utah Seismograph Station reported five small earthquakes including those with magnitudes of 3.4, 2.7 and 3.2 in a 20-minute period starting at 3:33 a.m. in an area 16 to 18 miles south of Gardiner. Earthquake information specialist Paul Roberson said there were another 20 to 30 small quakes Tuesday morning that hadn't yet been posted on the university's website. He called it a fairly normal swarm for Yellowstone. He didn't expect there to be any damage. Seismographs recorded 31 quakes in the same area south of Gardiner on Saturday, while another 23 were reported last Wednesday and Thursday in an area between 18 and 19 miles east-southeast of West Yellowstone. File June 3, 2014 -

FAQ about Recent News Reports - Earthquake, Ground Uplift, Animal Movement, and Helium

April 02, 2014 - Recent weeks have seen a flurry of news, real and imagined, about the Yellowstone volcanic system. Click here for a brief FAQ about several topics that have appeared in recent news reports

U.S. Gov't Quietly Soliciting Other Countries To House Americans If Yellowstone Super-Volcano Erupts!

April 4, 2014 -- (TRN) -- The United States government believes the Yellowstone Super-Volcano WILL erupt within the next ten years and has been offering to pay foreign countries $10 Billion a year for ten years if they agree to house Americans on an emergency basis if Yellowstone erupts.  Dr. Jean-Philippe Perrillat of the National Centre for Scientific Research in Grenoble, France confirms the magma build-up and ten year time-line!

Yellowstone's Volcano and Earthquake a Cataclysmic Mixture?

Tuesday, 01 Apr 2014 - The magnitude 4.8 earthquake that struck Yellowstone National Park on Sunday was the park's biggest since 1980, and prompted many to speculate whether such a quake could trigger the ancient super-volcano living just underneath. In December, BBC News reported that scientists found that the super-volcano ­ also known as a "caldera" ­ was 2.5 times larger than previously thought, and could therefore threaten the entire globe were it to erupt. In total, its magma chamber is now thought to stretch 55 miles and contain 120-370 cubic miles of molten lava. The caldera's last cataclysmic eruption occurred 2.1 million years ago, and was at least 25,000 times larger than the 1980 Mount St. Helen's eruption in Washington state that killed 57 and destroyed 150 square miles of forest. According to Reuters, geological evidence shows that the super-eruption covered half of North America in ash, and killed animals as far away as Nebraska.

Yellowstone National Park Hit By Magnitude 4.8 Earthquake

March 30 (Reuters) - Yellowstone National Park, which sits atop one of the world's largest super-volcanoes, was struck on Sunday by a magnitude 4.8 earthquake, the biggest recorded there since February 1980, but no damage or injuries were immediately reported. The tremor, a relatively light event by seismic standards, struck the northwest corner of the park and capped a flurry of smaller quakes at Yellowstone since Thursday, geologists at the University of Utah Seismograph Stations said in a statement. The latest earthquake struck at 6:34 a.m. near the Norris Geyser Basin and was felt about 23 miles (37 km) away in two small Montana towns adjacent to year-around entrances to the park - Gardiner and West Yellowstone. Also view 22 slides of Yellowstone here

Earthquake at Yellowstone Caldera is No Need for Concern

Monday, 03.31.14  - Over the weekend, the Yellowstone National Park felt its strongest earthquake since 1980 - a M4.7 event located just north of the Norris Geyser Basin at a depth of ~7 km. As you can guess, with such an earthquake, the Yellowstone-fearing throngs got a little nervous. However, this earthquake is nothing out of the ordinary for Yellowstone, even if it is larger than your average seismic event in or near the caldera. Over the past few hundred years, the caldera has felt numerous large earthquakes, including a M7.3 earthquake in 1959 and none of them have led to an eruption at Yellowstone (even a small one). In fact, if you really want to be worried about hazards from Yellowstones, earthquakes might be the bigger danger. Sunday's earthquake did not have the right focal mechanism to be directly related to magma moving below the surface either. You would expect if an earthquake was being caused by magma working its way upwards and making room for itself in the crust that any earthquake that were to occur would be one caused by extension. However, the recent M4.7 earthquake had a focal mechanism that suggests it was mainly reverse (compressional) with a smidge of strike-slip (side-by-side) motion - not what you would expect for magma moving upwards leading to an eruption. The area that the earthquake occurred is a region of uplift in the caldera and exactly why this uplift is occurring is still being researched.

Warning signs that Yellowstone may Erupt

Posted by Joe For America on Feb 27, 2014 - Some worrying developments are taking place at the Super Volcano located beneath Yellowstone National Park; the kind of developments that were seen shortly before other volcanoes erupted.  Not only was there a sudden rise in the elevation of the ground, and development of new cracks, but a gas called Helium-4, a very rare type of Helium, has begun coming out of the surface.  It is the presence of this gas that has scientists quite concerned.  If the Yellowstone Super Volcano were to erupt, it would be 2,000 times bigger than the eruption of Mount St. Helens in the 1980?s.  Everything within 500 miles would be dead or destroyed within minutes, 2/3rds of the entire United States would be covered in volcanic ash and the climate of the entire planet would cool within a month.  On top of that, just this past week, the largest earthquake in the US took place just a few miles from Yellowstone proving hot magma is on the move.  Here's what has scientists concerned: Since late summer 2013, the Yellowstone GPS network has tracked a small " ground deformation episode" in north-central Yellowstone National Park. During the past five months, the NRWY GPS station has recorded about 3.5 cm (1.4 in) of uplift (the ground is rising) and about 1 cm (0.4 in) of southeastward ground movement, relative to a stable reference station north of the Park. Measurements from other GPS stations in northern Yellowstone show smaller displacements, forming a circular pattern of deformation (circular - as in the round mouth of a volcano) consistent with a minor pressurization (building-up underground), about 6 to 10 km (4-6 miles) deep, near Norris Junction. What has scientists very concerned is that Yellowstone has suddenly begun emitting massive amounts of Helium-4.  Helium-4 seems to be the predictor of activity, as proved with other volcanos.


February 2, 2014 -- (TRN) -- A seismometer inside a borehole at Yellowstone National Park has begun reporting staggering underground activity near the southwest corner of Yellowstone Lake, possibly signaling the beginning of an eruption of the Super Volcano at the Yellowstone National Park. TRN has obtained the image of the Seismograph report and now YOU can see it for yourself!  This could be very nasty. . Yellowstone lake is pretty much the center of what is the Yellowstone Caldera; the mouth of a massive Super Volcano, located beneath the park.

 The activity began around 12:00 Noon, Mountain Standard Time (MST) on February 1, and was detected by a seismometer in Borehole B944 then continued, non-stop, all day yesterday getting worse and worse as the hours wore on.  The activity is continuing right now at 6:06 EST AM as this news article is being produced.

Yellowstone Park Sees Incredible Earthquake Swarm

Jan 7, 2009 11:48 AM - By Megan Boatwright, Local News 8 Reporter - Some pretty interesting things have been happening at Yellowstone National Park since December 26th.  Over the last week geologists have recorded more than 400 small earthquakes.  Quakes in that number are called an earthquake swarm. The incredibly long list represents 400 or more earthquakes that have happened under the lake.    "We think it's where more magma heat and steam escaped through cracks in the crust," said Clayton.  "That's probably what's causing the earthquakes."  He said the last time Yellowstone saw this kind of activity was close to twenty years ago, "What's interesting about this earthquake swarm is that it's in a very large and active volcano." "It's probably a little bit of magma moving through fractures.  There's also a lot of ground water under Yellowstone and some of the shallower earthquakes may be steam explosions and fractures underground,' said Clayton.  "Those can have quite a force, and send out shock waves that we record as earthquakes."

Quake Swarm Hits Yellowstone; Something Bigger to Come?

Small Earthquake Swarm on 9 January 2009 near northeast corner of Yellowstone Caldera: A currently modest swarm of earthquakes began in the northeast corner of the Yellowstone Caldera, about 10 miles (16 km) NNE of the north end of the Yellowstone Lake swarm that was active in late December and early January. As of 1930 MST, 10 earthquakes had been located by the University of Utah Seismograph Stations, the largest with M= 3.3 and two other events with M >2.0. Located depths are between 2 and 4 km.

December 30, 2008: Yellowstone National Park was jostled by a host of small earthquakes for a third straight day Monday, and scientists watched closely to see whether the more than 250 tremors were a sign of something bigger to come. Swarms of small earthquakes happen frequently in Yellowstone, located in Wyoming in the western U.S., but it's very unusual for so many earthquakes to happen over several days, said Robert Smith, a professor of geophysics at the University of Utah. "They're certainly not normal," Smith said. "We haven't had earthquakes in this energy or extent in many years." Smith directs the Yellowstone Seismic Network, which operates seismic stations around the park. He said the quakes have ranged in strength from barely detectable to one of magnitude 3.8 that happened Saturday. A magnitude 4 quake is capable of producing moderate damage.

Scientists observe unusual flurry of Yellowstone earthquakes over several days.

 Small Earthquake Swarm on 9 January 2009 near northeast corner of Yellowstone Caldera

A currently modest swarm of earthquakes began in the northeast corner of the Yellowstone Caldera, about 10 miles (16 km) NNE of the north end of the Yellowstone Lake swarm that was active in late December and early January. As of 1930 MST, 10 earthquakes had been located by the University of Utah Seismograph Stations, the largest with M= 3.3 and two other events with M >2.0. Located depths are between 2 and 4 km.

Yellowstone is once again showing a swarm of small earthquakes at this New Moon forward. As of Jan. 1, 2009 you are seeing a swarm of 241 earthquakes...this is cause for concern.

The University of Utah Seismograph Stations reports that a notable swarm of earthquakes has been underway since December 26 beneath Yellowstone Lake in Yellowstone National Park, three to six miles south-southeast of Fishing Bridge, Wyoming. This energetic sequence of events was most intense on December 27, when the largest number of events of magnitude 3 and larger occurred. This December 2008 earthquake sequence is the most intense in this area for some years and is centered on the east side of the Yellowstone caldera. For the Full Press Release Update on Dec. 29th

For more information and web links, check with our Volcano page here in this magazine.

You may wish to review a message from 2006 discussing Yellowstone and Volcano_Yellowstone Grows


 July 2014 ­ YELLOWSTONE - An eruption of the Yellowstone National Park supervolcano could last for over a year. The park sits on top of the world's largest active volcano, which erupted around 640,000 years ago and sent ash across most of North America. The two other recorded eruptions are 1.3 million and 2.1 million years ago. While discussing the effects of an eruption, supervolcano scientist Bob Smith told NBC that an eruption could last for a long time. "These giant eruptions in Yellowstone ­ the supervolcano, if you wish - probably last many, many months, maybe even years," Smith said. The story also discussed news that is actually six months old­that Smith and other scientists discovered that the magma pool underneath the volcano is about 2.5 times larger than previously thought.

They found that the cavern stretches for more than 55 miles. "We've been working there for a long time, and we've always thought it would be bigger but this finding is astounding," Smith, who is a professor at the University of Utah, told BBC at the time. The team used a network of seismometers to map the gigantic chamber. "We record earthquakes in and around Yellowstone, and we measure the seismic waves as they travel through the ground," said Dr. Jamie Farrell, also of the University of Utah. "The waves travel slower through hot and partially molten material with this, we can measure what's beneath." One theory is that eruptions happen every 700,000 years ago, but Smith said more data is needed to back that theory up. "If we were to have another big eruption, it would affect a large area, on the order of several states," Smith said. "But, as I said, that probability is very, very, very, very small. In my calculations, it's .0001 percent." ­Epoch Times




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