volcanoes Archives

December 14, 2020December 14, 2020 by Evan Gough

You Can See the Spot Where Lava Broke Through the Wall of a Martian Crater and Began Filling it Up

In this image, we can see a small notch in a crater rim with a well-formed channel. Lava appears to have flowed through this notch and filled in this approximately 10-kilometer diameter crater. Image Credit: NASA/JPL/UArizona

At a fundamental level, Mars is a volcanic planet. Its surface is home to the Solar System’s largest extinct volcano, Olympus Mons, and another trio of well-known volcanoes at Tharsis Montes. And those are just the highlights: there are many other volcanoes on the surface. Though that volcanic activity ceased long ago, the planet’s surface tells the tale of a world disrupted and shaped by powerful volcanic eruptions.

July 22, 2020July 22, 2020 by Evan Gough

It Looks Like There are Still Active Volcanoes on Venus

A radar image of Maat Mons on Venus, from the Magellan spacecraft. Image Credit: NASA/JPL

Venus’ surface is no stranger to volcanoes. Radar images show more than 1,000 volcanic structures on the planet. But for the most part, they appear to be ancient and inactive.

Now a new study says that Venus is still volcanically active, and has identified 37 volcanic structures that were recently active. If true, there’s more going on inside Venus than thought.

May 20, 2020May 20, 2020 by Evan Gough

40 Years Ago, Mount St. Helens Blew its Top Off

Mt. St. Helens in May, 2020, in an image from the Operational Land Imager (OLI) on LandSat8. Image Credit: Joshua Stevens, Robert Simmon, and Jesse Allen, using Landsat data from the U.S. Geological Survey.

One day, my Grade Nine science class got way more interesting.

Suddenly, volcanoes weren’t just something in textbooks. Though I was in neighbouring British Columbia when Mt. St. Helens erupted, there was still a layer of ash on our cars and everything else. For a teenager with a burgeoning interest in science, it was awesome.

April 17, 2020April 17, 2020 by Evan Gough

Anak Krakatau Erupted a Few Days Ago. Here’s What it Looked Like From Space

Plumes rise from Anak Krakatau on April 13th 2020 in this LandSat 8 OLI image. Image Credit: NASA Earth Observatory image by Lauren Dauphin, using Landsat data from the U.S. Geological Survey.

In between the Indonesian islands of Java and Sumatra lies the Sunda Strait. And in the Sunda Strait lies the much smaller island of Anak Krakatau, one of Earth’s active volcanoes. It’s erupted more than 50 times in the past 2,000 years, and now it’s doing it again.

April 14, 2020April 14, 2020 by Evan Gough

During Mass Extinction Events, Volcanoes Were Releasing About the Same Amount of CO2 as We Are Today

The Mount Redoubt volcano in Alaska. Image Credit: By R. Clucas - http://pubs.usgs.gov/dds/dds-39/album.html and http://gallery.usgs.gov/photos/03_29_2013_otk7Nay4LH_03_29_2013_5#.UrvS2vfTnrc, Public Domain, https://commons.wikimedia.org/w/index.php?curid=5768911

200 million years ago, a mass extinction event wiped out about 76% of all species on Earth—both terrestrial and marine. That event was called the end-Triassic extinction, or the Jurassic-Triassic (J-T) extinction event. At that time, the world experienced many of the same things as Earth is facing now, including a warming climate and the acidification of the oceans.

A new paper shows that pulses of volcanic eruptions were responsible, and that those pulses released the same amount of CO₂ as humans are releasing today.

January 5, 2020January 5, 2020 by Matt Williams

The Surprising Possibility That There are Still Active Volcanoes on Venus

This figure shows the volcanic peak Idunn Mons (at 46 degrees south latitude, 214.5 degrees east longitude) in the Imdr Regio area of Venus. The colored overlay shows the heat patterns derived from surface brightness data collected by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS), aboard the European Space Agency's Venus Express spacecraft. Image credit: NASA

Despite the similarities our world has with Venus, there is still much don’t know about Earth’s “Sister planet” and how it came to be. Thanks to its super-dense and hazy atmosphere, there are still unresolved questions about the planet’s geological history. For example, despite the fact that Venus’ surface is dominated by volcanic features, scientists have remained uncertain whether or not the planet is still volcanically active today.

While the planet is known to have been volcanically active as recent as 2.5 million years ago, no concrete evidence has been found that there are still volcanic eruptions on Venus’ surface. However, new research led by the USRA’s Lunar and Planetary Institute (LPI) has shown that Venus may still have active volcanoes, making it the only other planet in the Solar System (other than Earth) that is still volcanically active today.

November 21, 2019November 21, 2019 by Evan Gough

A Brand New Island in the Pacific has Survived 5 Years

Hunga Tonga-Hunga Ha‘apai with the ship SSV Robert C. Seamans. Image Credit: Captain Chris Nolan (Sea Education Association) of the SSV Robert C. Seamans (Oct. 2019).

A surtseyan eruption is a volcanic eruption in shallow water. It’s named after the island Surtsey, off the coast of iceland. In 2015, a surtseyan eruption in the Tongan Archipelago created the island Hunga Tonga-Hunga Ha‘apai. Despite the odds, that island is still there almost five years later.