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Alert Level: UNASSIGNED, Color Code: UNASSIGNED
2020-12-03 22:39:53 UTC





HAWAIIAN VOLCANO OBSERVATORY MONTHLY UPDATE
U.S. Geological Survey
Thursday, December 3, 2020, 12:39 PM HST (Thursday, December 3, 2020, 22:39 UTC)


LOIHI SEAMOUNT VOLCANO (VNUM #332000)
18°55'12" N 155°16'12" W, Summit Elevation -3199 ft (-975 m)
Current Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: UNASSIGNED

Following the May 11th earthquake swarm on Lō'ihi Seamount, earthquake activity has decreased and returned to average long-term earthquake rates, with one earthquake detected in the vicinity of the seamount in the past month.

Background: Intermittent earthquake activity has been recorded in the vicinity of Lō'ihi since as early as 1952. The most energetic earthquake sequence occurred in July-August 1996, which included more than 4,000 earthquakes, 95 of which were magnitude-4.0 to 4.9 events and nearly 300 were larger than magnitude 3 events. There are no working monitoring instruments on Lō'ihi Volcano whose peak is about 1,000 m (3,280 ft) below sea level. All real-time information about the volcano is derived from land-based seismometers on the Island of Hawai'i.


This notice contains additional volcanoes not displayed: Kilauea (NORMAL/GREEN), Hualalai (NORMAL/GREEN), Mauna Kea (NORMAL/GREEN), Haleakala (NORMAL/GREEN).

MORE INFORMATION:

Kilauea Activity summary also available by phone: (808) 967-8862

Other Hawaiian volcanoes summary also available by phone: (808) 967-8877

Subscribe to these messages: https://volcanoes.usgs.gov/vns2/

Kilauea Webcam images: https://www.usgs.gov/volcanoes/kilauea/webcams

Kilauea Photos/video: https://www.usgs.gov/volcanoes/kilauea/photo-video-chronology

Kilauea Lava flow maps: https://www.usgs.gov/volcanoes/kilauea/maps

Haleakala Summary: https://www.usgs.gov/volcanoes/haleakala

Hualalai Summary: https://www.usgs.gov/volcanoes/hualalai

Loihi Summary: https://www.usgs.gov/volcanoes/loihi-seamount

Mauna Kea Summary: https://www.usgs.gov/volcanoes/mauna-kea

Definitions of terms used in update: https://volcanoes.usgs.gov/volcanoes/kilauea/extra/definitions.pdf

Summary of volcanic hazards from Kīlauea eruptions: https://volcanoes.usgs.gov/volcanoes/kilauea/extra/hazards.pdf

Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hawaiian-volcano-observatory/earthquakes

Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/natural-hazards/volcano-hazards/about-alert-levels


CONTACT INFORMATION:

askHVO@usgs.gov

The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi.



HAWAIIAN VOLCANO OBSERVATORY MONTHLY UPDATE
U.S. Geological Survey
Thursday, November 5, 2020, 11:17 AM HST (Thursday, November 5, 2020, 21:17 UTC)


LOIHI SEAMOUNT VOLCANO (VNUM #332000)
18°55'12" N 155°16'12" W, Summit Elevation -3199 ft (-975 m)
Current Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: UNASSIGNED

Following the May 11th earthquake swarm on Lō'ihi Seamount, earthquake activity has decreased and returned to average long-term earthquake rates, with only three earthquakes detected in the vicinity of the seamount.

Background: Intermittent earthquake activity has been recorded in the vicinity of Lō'ihi since as early as 1952. The most energetic earthquake sequence occurred in July-August 1996, which included more than 4,000 earthquakes, 95 of which were magnitude-4.0 to 4.9 events and nearly 300 were larger than magnitude 3 events. There are no working monitoring instruments on Lō'ihi Volcano whose peak is about 1,000 m (3,280 ft) below sea level. All real-time information about the volcano is derived from land-based seismometers on the Island of Hawai'i.


This notice contains additional volcanoes not displayed: Kilauea (NORMAL/GREEN), Hualalai (NORMAL/GREEN), Mauna Kea (NORMAL/GREEN), Haleakala (NORMAL/GREEN).

MORE INFORMATION:

Activity summary for Mauna Loa is also available by phone: (808) 967-8866

Subscribe to these messages: https://volcanoes.usgs.gov/vns2/

Webcam images: https://www.usgs.gov/volcanoes/mauna-loa/webcams

Photos/video: https://www.usgs.gov/volcanoes/mauna-loa/photo-video-chronology

FAQs of Mauna Loa: https://www.usgs.gov/volcanoes/mauna-loa/faqs

Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hawaiian-volcano-observatory/hazards

Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/volcanoes/mauna-loa/monitoring

Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/natural-hazards/volcano-hazards/about-alert-levels

CONTACT INFORMATION:

askHVO@usgs.gov

The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi.