* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Wednesday, October 1, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Penn State-Themed Restaurant and Entertainment Spot Happy Valley Live Set to Open in State College – StateCollege.com

    Penn State-Themed Restaurant and Entertainment Spot Happy Valley Live Set to Open in State College – StateCollege.com

    The Police Made Chart History With This 1979 Hit Nearly 50 Years Ago – Yahoo

    How The Police Changed Music Forever with Their Iconic 1979 Hit Nearly 50 Years Ago

    Good Deed Entertainment Acquires Worldwide Rights To Liza Mandelup’s Documentary ‘Caterpillar’ – Deadline

    Good Deed Entertainment Lands Global Rights to Liza Mandelup’s Captivating Documentary ‘Caterpillar

    Danielle Fishel Explains Why Being on “DWTS” Makes Her Feel ‘Like It’s 1994 Again’ Filming “Boy Meets World” (Exclusive) – Yahoo

    Danielle Fishel Explains Why Being on “DWTS” Makes Her Feel ‘Like It’s 1994 Again’ Filming “Boy Meets World” (Exclusive) – Yahoo

    Jussie Smollett Claims He Was ‘Disrespected’ on the ‘Special Forces’ Season Premiere – Yahoo

    Jussie Smollett Opens Up About Feeling ‘Disrespected’ During the ‘Special Forces’ Season Premiere

    TicketSmarter Fall Entertainment Guide – Eastern Illinois University Athletics

    TicketSmarter Fall Entertainment Guide – Eastern Illinois University Athletics

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    STELLA Automotive AI Appoints Fred Seidelman as Chief Technology Officer – Yahoo Finance

    STELLA Automotive AI Appoints Fred Seidelman as New Chief Technology Officer

    Saving Energy and Money with Smart Technology – Terms of Service with Clare Duffy – Podcast on CNN Podcasts – CNN

    Saving Energy and Money with Smart Technology – Terms of Service with Clare Duffy – Podcast on CNN Podcasts – CNN

    Four Strategic Signals Technology Leaders Are Tuning In To – SPONSOR CONTENT FROM ARM – Harvard Business Review

    Four Essential Strategic Signals Every Technology Leader Should Watch

    Virginia Tech hosts annual New Music + Technology Festival this week – Cardinal News

    Virginia Tech Kicks Off Exciting Annual New Music and Technology Festival This Week

    Why I gave the world wide web away for free | Tim Berners-Lee – The Guardian

    Why I Decided to Make the World Wide Web Free for Everyone | Tim Berners-Lee

    From shale to steam: Fossil fuel technology boosts clean geothermal energy – Washington Examiner

    From Shale to Steam: How Fossil Fuel Technology is Powering a Clean Geothermal Energy Revolution

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Penn State-Themed Restaurant and Entertainment Spot Happy Valley Live Set to Open in State College – StateCollege.com

    Penn State-Themed Restaurant and Entertainment Spot Happy Valley Live Set to Open in State College – StateCollege.com

    The Police Made Chart History With This 1979 Hit Nearly 50 Years Ago – Yahoo

    How The Police Changed Music Forever with Their Iconic 1979 Hit Nearly 50 Years Ago

    Good Deed Entertainment Acquires Worldwide Rights To Liza Mandelup’s Documentary ‘Caterpillar’ – Deadline

    Good Deed Entertainment Lands Global Rights to Liza Mandelup’s Captivating Documentary ‘Caterpillar

    Danielle Fishel Explains Why Being on “DWTS” Makes Her Feel ‘Like It’s 1994 Again’ Filming “Boy Meets World” (Exclusive) – Yahoo

    Danielle Fishel Explains Why Being on “DWTS” Makes Her Feel ‘Like It’s 1994 Again’ Filming “Boy Meets World” (Exclusive) – Yahoo

    Jussie Smollett Claims He Was ‘Disrespected’ on the ‘Special Forces’ Season Premiere – Yahoo

    Jussie Smollett Opens Up About Feeling ‘Disrespected’ During the ‘Special Forces’ Season Premiere

    TicketSmarter Fall Entertainment Guide – Eastern Illinois University Athletics

    TicketSmarter Fall Entertainment Guide – Eastern Illinois University Athletics

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    STELLA Automotive AI Appoints Fred Seidelman as Chief Technology Officer – Yahoo Finance

    STELLA Automotive AI Appoints Fred Seidelman as New Chief Technology Officer

    Saving Energy and Money with Smart Technology – Terms of Service with Clare Duffy – Podcast on CNN Podcasts – CNN

    Saving Energy and Money with Smart Technology – Terms of Service with Clare Duffy – Podcast on CNN Podcasts – CNN

    Four Strategic Signals Technology Leaders Are Tuning In To – SPONSOR CONTENT FROM ARM – Harvard Business Review

    Four Essential Strategic Signals Every Technology Leader Should Watch

    Virginia Tech hosts annual New Music + Technology Festival this week – Cardinal News

    Virginia Tech Kicks Off Exciting Annual New Music and Technology Festival This Week

    Why I gave the world wide web away for free | Tim Berners-Lee – The Guardian

    Why I Decided to Make the World Wide Web Free for Everyone | Tim Berners-Lee

    From shale to steam: Fossil fuel technology boosts clean geothermal energy – Washington Examiner

    From Shale to Steam: How Fossil Fuel Technology is Powering a Clean Geothermal Energy Revolution

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Research reveals Hawai’i’s undersea volcano, Kama’ehu, erupted five times in past 150 years

August 4, 2023
in Science
Research reveals Hawai’i’s undersea volcano, Kama’ehu, erupted five times in past 150 years
Share on FacebookShare on Twitter

Research reveals Hawai'i's undersea volcano, Kama'ehu, erupted five times in past 150 years

Undersea images of lava from Kama’ehu volcano, contrasting fresh-looking young lavas (top) versus older sediment-covered lavas (bottom). Credit: The two images on the bottom are courtesy of JAMSTEC.

Kamaʻehuakanaloa (formerly Lōʻihi Seamount), a submarine Hawaiian volcano located about 20 miles off the south coast of the Big Island of Hawai’i, has erupted at least five times in the last 150 years, according to new research led by Earth scientists at the University of Hawai’i at Mānoa. For the first time, scientists were able to estimate the ages of the most recent eruptions of Kamaʻehu, as well as the ages of eight additional older eruptions at this volcano going back about 2,000 years. Their findings were published recently in Geology.

Hawaiian volcanoes are thought to transition through a series of growth stages. Kamaʻehu is currently in the earliest submarine “pre-shield” stage of growth, whereas the active neighboring volcano Kīlauea is in its main shield-building stage.

“Kamaʻehu is the only active and exposed example of a pre-shield Hawaiian volcano,” said Aaron Pietruszka, lead author of the study and associate professor in the Department of Earth Sciences at the UH Mānoa School of Ocean and Earth Science and Technology (SOEST). “On the other Hawaiian volcanoes, this early part of the volcanic history is covered by the great outpouring of lava that occurs during the shield stage. Thus, there is great interest in learning about the growth and evolution of Kama’ehu.”

Kama’ehu’s history revealed with chemistry and underwater videos

Previously, the only known and confirmed eruption of Kamaʻehu was the one that occurred in 1996, an event that was only discovered because it coincided with a large swarm of earthquakes that were detected remotely by seismometers on the Big Island.

“Seismometers can only be used to detect the ongoing active eruptions of submarine volcanoes because earthquakes are transient,” said Pietruszka. “In order to determine the ages of older eruptions at Kamaʻehu, we took a different approach. We used a mass spectrometer to measure tiny amounts of the isotope radium-226 in pieces of quenched glassy lava that were sampled from the seafloor outcrops of Kamaʻehu using a submersible.”

Magma naturally contains radium-226, which radioactively decays at a predictable rate. So, Pietruzska and co-authors used the amount of radium-226 in each sample to infer the approximate time elapsed since the lava was erupted on the seafloor, that is, the eruption age of the sample.

Pietruszka started this investigation many years ago as a postdoctoral researcher at the Carnegie Institution for Science, just after finishing his doctoral degree in Earth science from SOEST. Once he returned to UH Mānoa in 2019, he got access to submersible dive videos and photos around Kama’ehu and had the information he needed to finish connecting the dots.

“The submersible dive images and videos provided independent confirmation of our estimates of eruption ages,” said Pietruszka. “The lavas with the freshest appearance also had the most radium-226, and vice versa for the lavas with the ‘older’ appearance, that is, fractured and broken, and/or covered with marine sediment. I was surprised to discover that Kama’ehu had erupted five times within the last ~150 years, which implies a frequency of ~30 years between eruptions at this volcano. This is much slower than at Kīlauea, which erupts almost continuously (with infrequent pauses of only a few years).”

Chemical changes in lava over time

The chemistry of the lava erupted from Hawaiian volcanoes changes over time. The new eruption ages for the lavas from Kama’ehu, coupled with measurements of lava chemistry, reveal that the timescale of variation in lava chemistry at this pre-shield volcano is about 1200 years. In contrast, Kīlauea lava chemistry changes over a timescale of only a few years to decades, with a complete cycle over about 200 years.

“We think that the origin of this difference is related to the position of the two volcanoes over the Hawaiian hotspot,” said Pietruszka. “This is an area of Earth’s mantle that is rising toward the surface—a “mantle plume” that ultimately melts to form the magma that supplies Hawaiian volcanoes. Models and other isotope data from thorium-230 suggest that the center of a mantle plume should rise faster than its margin. Our results—specifically, the factor of six longer timescale of variation in lava chemistry at Kama’ehu—provides independent confirmation of this idea.”

The research team hopes to better understand how Hawaiian volcanoes work from their earliest growth stages to their full, and frequently active, maturity to help them understand the deep controls on volcanic eruptions that initiate within the mysterious, upwelling mantle plume under the Hawaiian hotspot.

More information:
Aaron J. Pietruszka et al, Slow changes in lava chemistry at Kama’ehuakanaloa linked to sluggish mantle upwelling on the margin of the Hawaiian plume, Geology (2023). DOI: 10.1130/G51350.1

Citation:
Research reveals Hawai’i’s undersea volcano, Kama’ehu, erupted five times in past 150 years (2023, August 3)
retrieved 3 August 2023
from https://phys.org/news/2023-08-reveals-hawaii-undersea-volcano-kamaehu.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Phys.org – https://phys.org/news/2023-08-reveals-hawaii-undersea-volcano-kamaehu.html

Tags: ResearchRevealsscience
Previous Post

Scientists discover the highest-energy light coming from the sun

Next Post

New exoplanet discovery builds better understanding of planet formation

Atlanta Braves Manager Brian Snitker Moving to ‘Advisory Role’ – FOX Sports

Atlanta Braves Manager Brian Snitker Moving to ‘Advisory Role’ – FOX Sports

October 1, 2025
The sleepy SF neighborhood that just became one of the world’s coolest – SFGATE

The sleepy SF neighborhood that just became one of the world’s coolest – SFGATE

October 1, 2025
The “stuck economy,” tariffs and Wall Street – marketplace.org

How Tariffs and Wall Street Are Strangling the Economy’s Growth

October 1, 2025
LSU Theatre’s season opener: A handkerchief discovered by a lovesick suitor adds up to hilarity – The Advocate

Love, Laughter, and a Lost Handkerchief: LSU Theatre’s Season Opener Promises Hilarious Fun

October 1, 2025
Rural Health Transformation (RHT) Program – Centers for Medicare & Medicaid Services | CMS (.gov)

Rural Health Transformation (RHT) Program – Centers for Medicare & Medicaid Services | CMS (.gov)

October 1, 2025
Ex-NATO head on Russia: ‘We cannot change Putin’s mind’ – DW

Ex-NATO head on Russia: ‘We cannot change Putin’s mind’ – DW

October 1, 2025
PFAS in East Selah drinking water – Washington State Department of Ecology (.gov)

Alarming PFAS Contamination Discovered in East Selah Drinking Water

October 1, 2025
Science Expo – Northern Public Radio

Discover the Wonders of Science at the Exciting Expo!

October 1, 2025
Science and artificial intelligence could help personalize brain stimulation for smokers – News-Medical

How Science and AI Are Transforming Personalized Brain Stimulation to Help Smokers Quit

October 1, 2025
Review: What’s good at new prime-cuts steakhouse in Virginia Beach – Yahoo

Review: What’s good at new prime-cuts steakhouse in Virginia Beach – Yahoo

October 1, 2025

Categories

Archives

October 2025
M T W T F S S
 12345
6789101112
13141516171819
20212223242526
2728293031  
« Sep    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (845)
  • Economy (866)
  • Entertainment (21,740)
  • General (17,348)
  • Health (9,910)
  • Lifestyle (879)
  • News (22,149)
  • People (868)
  • Politics (877)
  • Science (16,076)
  • Sports (21,367)
  • Technology (15,849)
  • World (849)

Recent News

Atlanta Braves Manager Brian Snitker Moving to ‘Advisory Role’ – FOX Sports

Atlanta Braves Manager Brian Snitker Moving to ‘Advisory Role’ – FOX Sports

October 1, 2025
The sleepy SF neighborhood that just became one of the world’s coolest – SFGATE

The sleepy SF neighborhood that just became one of the world’s coolest – SFGATE

October 1, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version