Hazard Notification System (HANS) for Volcanoes


U.S. Geological Survey
Sunday, August 29, 2021, 9:48 AM HST (Sunday, August 29, 2021, 19:48 UTC)

19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Activity Summary: Kīlauea volcano is not erupting. However, intrusive activity that began on August 23 continues south of Kīlauea caldera. Ground deformation in Kīlauea’s south summit region continues, though at a rate slightly lower than the rates seen in the first intrusive pulse spanning August 23-25. In contrast, current earthquake activity remains low compared to the earlier pulses of this intrusive activity. The East Rift Zone remains quiet.


The rate of ground deformation beneath the south part of Kīlauea summit region, within Hawaiʻi Volcanoes National Park, decreased slightly on the evening of August 28. The current rate is slightly lower than the rates seen in the first intrusive pulse spanning August 23-25. These observations suggest that magma is continuing to be supplied to the ongoing intrusion.

Over the past 24 hours, approximately 95 earthquakes were recorded at Kīlauea summit and south of Kīlauea caldera. Most of the earthquakes were less than magnitude 2 and occurred approximately 1-4 km (0.6-2.5 mi) below the surface. These small earthquakes have occurred at up to 7 detected earthquakes per hour. These earthquake rates are significantly lower than the rates observed earlier this week.

At the time of this statement, activity continues but there is no indication of upward migration of earthquakes toward the surface or change in deformation that would indicate shallowing of the source intrusive activity. Accordingly, Kīlauea’s Volcano Alert Level and Aviation Color Code remain at ADVISORY/YELLOW.

The Hawaiian Volcano Observatory (HVO) continues to closely monitor Kīlauea for changes in activity. HVO will continue to issue Kīlauea status reports and additional messages as needed.

For more information, see the following:

Kīlauea Status Report published August 28, 2021, 11:42 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-28T14:04:50-07:00

Kīlauea Information Statement published August 27, 2021, 9:54 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-27T11:30:41-07:00

“Volcano Watch” article published August 26, 2021, “New Kīlauea Summit Intrusion Draws Comparison to Past Activity”: https://www.usgs.gov/center-news/volcano-watch-new-k-lauea-summit-intrusion-draws-comparison-past-activity

Kīlauea Volcanic Activity Notice published August 26, 2021, 9:44 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-26T11:56:17-07:00

Kīlauea Daily Update published August 25, 2021, 9:23 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-25T12:10:48-07:00

Kīlauea Volcanic Activity Notice published August 24, 2021, 5:34 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-24T07:43:18-07:00

Kīlauea Information Statement published August 24, 2021, 3:09 AM HST: https://volcanoes.usgs.gov/hans2/index/notice/DOI-USGS-HVO-2021-08-24T05:43:46-07:00

More Information:
Kīlauea activity summary also available by phone: (808) 967-8862
Kīlauea webcam images: https://www.usgs.gov/volcanoes/kilauea/webcams
Kīlauea photos/video: https://www.usgs.gov/volcanoes/kilauea/photo-video-chronology
Kīlauea lava-flow maps: https://www.usgs.gov/volcanoes/kilauea/maps
Kīlauea FAQs: https://www.usgs.gov/volcanoes/kilauea/faqs

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

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/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



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.