After Years of Calm, Giant Geyser Erupts in Yellowstone

Sept 28, 2015, 5:03 am: The second largest active geyser in the world, Giant Geyser, erupted in Yellowstone early Monday morning. Watch videos.
Author:
Updated:
Original:
Giant Geyser in Yellowstone near Old Faithful

Giant Geyser in Yellowstone near Old Faithful

Sept 28, 2015, 5:03 am: The second largest active geyser in the world, Giant Geyser, erupted in Yellowstone early Monday morning. The impressive spray lasted for about an hour. Luck would have it that there was a full moon illuminating the scene, so the webcams in Yellowstone's Old Faithful area caught the show.

At the start of the below video (courtesy of Geyser Observation and Study Association), Oblong geyser is erupting. The Giant Hot Period is at 0503 (possibly Mastiff). Giant appears to start about 0506 or 0507, but it is hard to tell for certain.

Giant geyser's previous reported eruption was on January 22, 2010, the second in that month. This makes a break of 5 years and 250 days before Monday's event.

The below video shows a previous eruption from June 6, 2006

Giant Geyser is a cone-type geyser in the Upper Geyser Basin of Yellowstone northwest of Old Faithful Geyser. It's cone is about 12-feet tall. An eruption can reach up to 250-feet in height, then dropping to about 100-feet for the hour-long duration. In comparison, Old Faithful's eruptions top out at 140-feet.

Giant Geyser is the namesake for the Giant Group of geysers, which includes Bijou Geyser, Giant Geyser, and Mastiff Geyser. Giant Geyser is also the namesake for the Giant Platform, a raised stone structure incorporating all these geysers.

Learn more about Yellowstone geysers and hot springs

Related

Yellowstone-Geysers

Watch Geysers Erupt in Yellowstone

Yellowstone is the largest active geyser field in the world.

Test tube geyser from YouTube video

Why Do Geysers Erupt?

Watch a video showing a test tube "geyser" with clear looping chambers underneath. It slowly bubbles until the pressure is reached, creating a blast.

Steamboat Geyser May-23, 2005

Steamboat, World's Tallest Geyser, Erupts Unexpectedly in Yellowstone

Saturday, May 5, 2018, marked the fifth time in seven weeks that the unpredictable Steamboat Geyser has erupted.

Yellowstone's most famous geyser, Old Faithful at Twilight

8 Best Yellowstone Geyser Basins and Map

A map showing Yellowstone's geyser basins including the Upper Geyser Basin with Old Faithful and Morning Glory Pool, and nearby Grand Prismatic.

Yellowstone Old Faithful Geyser

See Old Faithful and 60% of the World's Geysers in Yellowstone's Upper Geyser Basin

See Old Faithful, Castle Geyser, Riverside Geyser and geothermal features of Yellowstone country's steaming vents, erupting geysers and gurgling hot springs.

Steamboat Geyser in Norris Geyser Basin

Yellowstone Geyser Trivia

Steamboat Geyser in Norris Geyser Basin. No one can predict when it's going to erupt, as it works on an odd schdeule, ranging from four days to fifty years.

Giantess Geyser

This is Yellowstone: Giantess Geyser

An infrequent, but violent Yellowstone geyser recently erupted after its longest period of known dormancy.

Porkchop Geyser in Norris Back Basin. Photo by Gloria Wadzinski

Man Confirmed Dead After Fall in Yellowstone Hot Spring

Colin Nathaniel Scott slipped and fell in a hot spring Tuesday, June 7, 2016 when he and his sister left the boardwalk in the Norris Geyser Basin

Road Construction after Labor Day 2014

Road Closings in Yellowstone After Labor Day 2014

Two sections of Yellowstone National Park's Grand Loop Road will be closed for construction - Old Faithful to West Thumb, and Mammoth to Norris.