Ka‘ū News Briefs, Saturday, June 11, 2022

HAWAIIAN VOLCANO OBSERVATORY'S DR. ASHTON FLINDERS WILL SOON BE ON EXPEDITION IN A RARELY EXPLORED AREA OF THE ATLANTIC SEAFLOOR. This week's Volcano Watch, written by USGS scientists and affiliates notes that June 8 was World Oceans Day, "a day to appreciate the huge body of saltwater that covers about 71% of the Earth’s surface." Here is Volcano Watch:

     Sometimes it's easy to forget that our volcanic island is surrounded by oceans and one of the most distant places from continents on Earth. The ocean floor remains one of the most poorly understood places on our planet.

Dr. Ashton Flinders, research geophysicist with U.S. Geological Survey's Hawaiian Volcano Observatory,  co-leads a deep sea expedition. Portrait from USGS

    This month and into summer, Dr. Ashton Flinders, research geophysicist with the U.S. Geological Survey’s Hawaiian Volcano Observatory is co-leading a National Oceanic and Atmospheric Administration Ocean Exploration expedition to a poorly explored section of the of the Atlantic Ocean floor north of and around the Azores Islands.
    Flinders’ trip is the second in a series of three expeditions taking place from May through August 2022 called NOAA’s Voyage to the Ridge 2022. The expedition will be broadcast live as it happens, so you can follow Dr. Flinders on this exciting journey.
    Flinders’ participation in this expedition continues a long legacy of HVO’s involvement in submarine exploration. During the expedition, he will work as a science ambassador, helping coordinate onboard and shore-side scientists to plan and accomplish exploration missions. He will provide his scientific expertise to assist in the description of newly explored areas including live narration during the ROV dives.
    Flinders flies from Hilo to Saint John’s, Newfoundland, Canada, where he will board NOAA Ship Okeanos Explorer. The ship will leave Saint John’s on June 16th, making its way 900 miles (1,450 km) to the intersection of Charlie-Gibbs Fracture Zone and the Mid-Atlantic Ridge (MAR).
    The ship will sail south along a poorly explored section of the MAR and will arrive in the Azores archipelago in mid-July. These nine islands are an autonomous region of Portugal that sit at the triple junction boundary that separates the North American, Eurasian, and African Plates. These volcanic islands are the expression of hotspot volcanism, though it differs significantly from the Hawaiian hotspot.
    Spanning the north-south length of the Atlantic Ocean and stretching an impressive 10,000 miles (16,100 km), the MAR is the longest mountain range in the world and one of four major spreading ridges that create new oceanic crust.
    The MAR is offset by hundreds of faults and is unique in having a deep fault valley along much of the crest of the range that is the site of volcanic activity and frequent earthquakes. In other areas of the MAR, spectacular hydrothermal vents often form where magma provides heat as it rises to the seafloor.

Thermal vents on the deep ocean floor are under study this summer with a Hawaiian Volcano Observatory scientist on board the NOAA research vessel. Photo from NOAA

    These vents are known to support diverse biologic communities that thrive on chemical reactions that replace the sunlight at the bottom of the ocean. However, little is known about life at these sites once vents go extinct, or what life lies beyond the vents, further away from the rift zone. Expeditions aboard Ship Okeanos Explorer have resulted in the discovery of new species, unseen before.
   The Voyage to the Ridge expedition is a part of a major multi-year, multi-national collaborative ocean exploration field program focused on raising collective knowledge and understanding of the North Atlantic Ocean; the Atlantic Seafloor Partnership for Integrated Research and Exploration (ASPIRE).
    The North Atlantic Ocean plays a pivotal role to humankind, providing biological and geological resources, seafood production and climate regulation, and a route for trade and travel between Europe and the Americas. With increased globalization, efforts to understand, conserve, manage, and defend the maritime commons have become an essential shared responsibility.
    Seafloor mapping during NOAA’s upcoming expedition to the Atlantic will be visible on the live stream whenever remotely operated vehicle (ROV) dives are not being conducted. ROV dives may span depths ranging from 820 to 19,685 feet (250–6,000 m) deep. During dives, they expect to explore deep-sea coral and sponge habitats, potential hydrothermal vent and extinct polymetallic sulfide systems, fracture and rift zones, and the water column. Dives will be streamed daily, from approximately 6:45 a.m. to 5 p.m. EDT (12:45 a.m. to 11 a.m. HST).

Deep water corals will be among the species studied during HAVO scientist Ashton Flinders' research this summer. Photo from NOAA

    Whether you are here on the Island of Hawai‘i, surrounded by the Pacific Ocean, or remotely observing NOAA mapping the Atlantic Ocean floor in several weeks, we hope you take a moment to appreciate our oceans and the important role they play in making life on Earth possible.
   Volcano Activity Updates; Kīlauea volcano is erupting. Its USGS Volcano Alert level is at WATCH (https://www.usgs.gov/natural-hazards/volcano-hazards/about-alert-levels). Kīlauea updates are issued daily.
    Over the past week, lava has continued to erupt from the western vent within Halemaʻumaʻu crater. All lava is confined within Halemaʻumaʻu crater in Hawai‘i Volcanoes National Park. Sulfur dioxide emission rates remain elevated and were last measured at approximately 1,900 tonnes per day (t/d) on June 8. Seismicity is elevated but stable, with few earthquakes and ongoing volcanic tremor. Summit tiltmeters recorded several minor deflation-inflation trends over the past week. For more information on the current eruption of Kīlauea, see https://www.usgs.gov/volcanoes/kilauea/recent-eruption.
    Mauna Loa is not erupting and remains at Volcano Alert Level ADVISORY. This alert level does not mean that an eruption is imminent or that progression to an eruption from the current level of unrest is certain. Mauna Loa updates are issued weekly.
    This past week, about 30 small-magnitude earthquakes were recorded below the summit and upper elevation flanks of Mauna Loa—the majority of these occurred at shallow depths less than 15 kilometers

NOAA's Okenos Explorer will carry the expedition to explore hotspot  volcanism and discover news underwater species this summer. NOAA photo

(9 miles) below sea level. Global Positioning System (GPS) measurements show low rates of ground deformation over the past week. Gas concentrations and fumarole temperatures at both the summit and at Sulphur Cone on the Southwest Rift Zone have remained stable over the past week. Webcams show no changes to the landscape. For more information on current monitoring of Mauna Loa, see: https://www.usgs.gov/volcanoes/mauna-loa/monitoring.
   Two earthquakes were reported felt in the Hawaiian Islands during the past week: a M3.1 earthquake 15 km (9 mi) SSW of Leilani Estates at 6 km (3 mi) depth on June 5 at 3:01 a.m. HST, and a M2.3 earthquake 2 km (1 mi) S of Captain Cook at 9 km (6 mi) depth on June 3 at 9:20 p.m. HST.
    HVO continues to closely monitor Kīlauea's ongoing eruption and Mauna Loa for any signs of increased activity.
    Visit HVO’s website for past Volcano Watch articles, Kīlauea and Mauna Loa updates, volcano photos, maps, recent earthquake info, and more. Email questions to askHVO@usgs.gov.