Volcanoes at elevated alert
4 volcanoes are at an elevated alert level in the latest USGS data (1 orange, 3 yellow).
Last successful collection 2026-10-23 14:04 UTC · Source: USGS Hazard Notification System (HANS)
Elevated is not the same as erupting. An elevated alert means USGS sees activity above the volcano’s background level. Some elevated volcanoes are erupting, many are only showing unrest. Each USGS notice says which.
US-monitored volcanoes only. USGS HANS covers volcanoes watched by US observatories, so eruptions elsewhere in the world do not appear here. This is not an emergency alert service.
Summary
- Elevated volcanoes
- 4
- ORANGE · WATCH
- 1
- YELLOW · ADVISORY
- 3
Where they are
Compare these volcanoes side by side.
Land and borders: Natural Earth (public domain)
4 volcanoes on the map.
Positions are each volcano’s coordinates in the USGS volcano registry, not an eruption location. Drag to pan, use the buttons or double-click to zoom. Keyboard: Tab to the markers, arrow keys move between them, Enter selects, + / − zoom. The cards below list the same volcanoes.
Select a marker or a volcano card to see its details here.
Legend
Volcanoes · triangle, USGS colour code
- Yellow, advisory
- Orange, watch
- Red, warning
US-monitored volcanoes at an elevated alert only.
Clusters
- Number of nearby events at this zoom. Select to zoom in.
Volcano by volcano
Most severe USGS colour code first, then alphabetical.
Great Sitkin
ORANGEWATCH
- Aviation colour code:
- ORANGE
- Alert level:
- WATCH
- Location:
- 52.08°, -176.11° (USGS registry coordinates)
- Monitored by:
- Alaska Volcano Observatory
- Latest USGS notice:
- 2026-10-22 19:49 UTC
USGS defines orange / watch as: Unrest is heightening or escalating and an eruption is possible, or an eruption is underway with limited hazards.
Ahyi Seamount
YELLOWADVISORY
- Aviation colour code:
- YELLOW
- Alert level:
- ADVISORY
- Location:
- 20.44°, 145.03° (USGS registry coordinates)
- Monitored by:
- Northern Mariana Islands
- Latest USGS notice:
- 2026-10-22 23:16 UTC
USGS defines yellow / advisory as: Unrest is above the volcano’s known background level. It does not mean an eruption is imminent.
Kilauea
YELLOWADVISORY
- Aviation colour code:
- YELLOW
- Alert level:
- ADVISORY
- Location:
- 19.42°, -155.29° (USGS registry coordinates)
- Monitored by:
- Hawaiian Volcano Observatory
- Latest USGS notice:
- 2026-10-22 20:00 UTC
USGS defines yellow / advisory as: Unrest is above the volcano’s known background level. It does not mean an eruption is imminent.
Shishaldin
YELLOWADVISORY
- Aviation colour code:
- YELLOW
- Alert level:
- ADVISORY
- Location:
- 54.76°, -163.97° (USGS registry coordinates)
- Monitored by:
- Alaska Volcano Observatory
- Latest USGS notice:
- 2026-10-22 19:49 UTC
USGS defines yellow / advisory as: Unrest is above the volcano’s known background level. It does not mean an eruption is imminent.
What the colours and levels mean
USGS pairs an aviation colour code with a ground-based alert level. Only volcanoes above normal are listed on this page.
- REDWARNING
- A hazardous eruption is imminent, underway or suspected.
- ORANGEWATCH
- Unrest is heightening or escalating and an eruption is possible, or an eruption is underway with limited hazards.
- YELLOWADVISORY
- Unrest is above the volcano’s known background level. It does not mean an eruption is imminent.
- GREENNORMAL
- Typical background activity. Not listed here unless USGS reports it as elevated.
Summarised from USGS volcano alert-level definitions; the notice linked on each card is the authoritative statement for that volcano. USGS alert levels (opens in new tab)