Hazard Notification System (HANS) for Volcanoes
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Volcanic aviation notices published in the last year.
2025-06-30 06:20:06 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 27 of the ongoing Halemaʻumaʻu eruption ended abruptly at 7:54 p.m. HST on June 29. Earlier, lava fountains had reached heights of 1,100 ft (340 m).
2025-06-30 06:20:06 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 27 of the ongoing Halemaʻumaʻu eruption ended abruptly at 7:54 p.m. HST on June 29. Earlier, lava fountains had reached heights of 1,100 ft (340 m).
2025-06-29 19:31:07 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 27 of the ongoing Halemaʻumaʻu eruption began at 9:05 a.m. HST on June 29. Lava fountains are reaching heights of 500 feet (150 meters) at this time.
2025-06-29 19:31:07 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 27 of the ongoing Halemaʻumaʻu eruption began at 9:05 a.m. HST on June 29. Lava fountains are reaching heights of 500 feet (150 meters) at this time.
2025-06-28 18:50:19 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Precursory low-level activity for episode 27 of the ongoing Halemaʻumaʻu eruption began around 7:27 a.m. HST on June 28.
2025-06-28 18:50:19 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Precursory low-level activity for episode 27 of the ongoing Halemaʻumaʻu eruption began around 7:27 a.m. HST on June 28.
2025-06-20 20:58:41 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 26 of the ongoing Halemaʻumaʻu eruption ended abruptly at 10:25 a.m. HST on Friday, June 20.
2025-06-20 20:58:41 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 26 of the ongoing Halemaʻumaʻu eruption ended abruptly at 10:25 a.m. HST on Friday, June 20.
2025-06-20 12:10:34 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 26 of the ongoing Halemaʻumaʻu eruption began at approximately 1:40 a.m. HST on June 20, 2025.
2025-06-20 12:10:34 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 26 of the ongoing Halemaʻumaʻu eruption began at approximately 1:40 a.m. HST on June 20, 2025.
2025-06-20 09:54:33 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Low-level precursory activity started within Halemaʻumaʻu at 11:26 p.m. HST on 6/19/2025.
2025-06-20 09:54:33 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Low-level precursory activity started within Halemaʻumaʻu at 11:26 p.m. HST on 6/19/2025.
2025-06-12 06:27:42 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption ended at 8:08 p.m. HST on June 11, 2025.
2025-06-12 06:27:42 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption ended at 8:08 p.m. HST on June 11, 2025.
2025-06-11 22:39:28 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption began at 11:57 a.m. HST on June 11, 2025.
2025-06-11 22:39:28 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption began at 11:57 a.m. HST on June 11, 2025.
2025-06-10 17:56:51 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 precursory activity started within Halemaʻumaʻu on the morning of June 10.
2025-06-10 17:56:51 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 precursory activity started within Halemaʻumaʻu on the morning of June 10.
2025-06-05 15:37:45 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption ended abruptly at 4:28 a.m. HST on June 5.
2025-06-05 15:37:45 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption ended abruptly at 4:28 a.m. HST on June 5.
2025-06-05 08:51:18 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption began at 8:55 PM HST on June 4.
2025-06-05 08:51:18 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption began at 8:55 PM HST on June 4.
2025-06-03 22:36:19 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 precursory activity started within Halemaʻumaʻu during the morning on June 3
2025-06-03 22:36:19 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 precursory activity started within Halemaʻumaʻu during the morning on June 3
2025-05-05 20:00:48 UTC, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further exposlive activity observed.
2025-05-05 20:00:48 UTC, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further exposlive activity observed.
2025-04-25 21:47:41 UTC, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - Small explosion detected in geophysical data at 10:34 AKDT April 25.
2025-04-25 21:47:41 UTC, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - Small explosion detected in geophysical data at 10:34 AKDT April 25.
2025-03-03 23:52:27 UTC, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further activity observed. Aviation Color Code and Alert Level has been changed to GREEN/NORMAL
2025-03-03 23:52:27 UTC, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further activity observed. Aviation Color Code and Alert Level has been changed to GREEN/NORMAL
2025-02-21 20:14:55 UTC, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - No further activity observed. Aviation Color Code and Alert Level has been changed to YELLOW/ADVISORY
2025-02-21 20:14:55 UTC, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - No further activity observed. Aviation Color Code and Alert Level has been changed to YELLOW/ADVISORY
2025-02-21 06:11:07 UTC, Atka volcanic complex ORANGE
AVO Atka volcanic complex ORANGE/WATCH - Small explosive event detected by local seismic and infrasound data. Aviation Color Code and Alert Level has been changed to ORANGE/WATCH.
2025-02-21 06:11:07 UTC, Atka volcanic complex ORANGE
AVO Atka volcanic complex ORANGE/WATCH - Small explosive event detected by local seismic and infrasound data. Aviation Color Code and Alert Level has been changed to ORANGE/WATCH.
2025-01-29 02:01:57 UTC, Okmok UNASSIGNED
AVO Okmok UNASSIGNED/UNASSIGNED - Major network outage due to power system degradation.
2025-01-29 02:01:57 UTC, Okmok UNASSIGNED
AVO Okmok UNASSIGNED/UNASSIGNED - Major network outage due to power system degradation.
2024-12-23 16:43:22 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea is erupting in the summit caldera within Hawai'i Volcanoes National Park; status reduced from WARNING/RED to WATCH/ORANGE.
2024-12-23 16:43:22 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea is erupting in the summit caldera within Hawai'i Volcanoes National Park; status reduced from WARNING/RED to WATCH/ORANGE.
2024-12-23 12:41:27 UTC, Kilauea RED
HVO Kilauea RED/WARNING - Kīlauea is erupting within the summit caldera, status is being raised from ADVISORY/YELLOW to RED/WARNING.
2024-12-23 12:41:27 UTC, Kilauea RED
HVO Kilauea RED/WARNING - Kīlauea is erupting within the summit caldera, status is being raised from ADVISORY/YELLOW to RED/WARNING.
2024-11-19 23:43:33 UTC, Ahyi Seamount YELLOW
NMI Ahyi Seamount YELLOW/ADVISORY - Plume of discolored water and possible floating pumice; Aviation Color Code and Volcano Alert Level raised to YELLOW and ADVISORY..
2024-11-19 23:43:33 UTC, Ahyi Seamount YELLOW
NMI Ahyi Seamount YELLOW/ADVISORY - Plume of discolored water and possible floating pumice; Aviation Color Code and Volcano Alert Level raised to YELLOW and ADVISORY..
2024-10-16 20:07:39 UTC, Spurr YELLOW
AVO Spurr YELLOW/ADVISORY - Volcanic unrest has gradually increased over past several months. Aviation Color Code and Volcano Alert Level raised to YELLOW/ADVISORY.
2024-10-16 20:07:39 UTC, Spurr YELLOW
AVO Spurr YELLOW/ADVISORY - Volcanic unrest has gradually increased over past several months. Aviation Color Code and Volcano Alert Level raised to YELLOW/ADVISORY.
2024-10-01 18:04:56 UTC, Wrangell GREEN
AVO Wrangell GREEN/NORMAL - The seismic network on Mount Wrangell volcano is now functioning.
2024-10-01 18:04:56 UTC, Wrangell GREEN
AVO Wrangell GREEN/NORMAL - The seismic network on Mount Wrangell volcano is now functioning.
2024-09-23 18:12:18 UTC, Kilauea YELLOW
HVO Kilauea YELLOW/ADVISORY - Kīlauea’s middle East Rift Zone eruption has ended, status is being lowered from ORANGE/WATCH to YELLOW/ADVISORY.
2024-09-23 18:12:18 UTC, Kilauea YELLOW
HVO Kilauea YELLOW/ADVISORY - Kīlauea’s middle East Rift Zone eruption has ended, status is being lowered from ORANGE/WATCH to YELLOW/ADVISORY.
2024-09-16 10:23:58 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea’s middle East Rift Zone intrusion continues, increasing the potential for an eruption in this area; status is being raised to ORANGE/WATCH.
2024-09-16 10:23:58 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea’s middle East Rift Zone intrusion continues, increasing the potential for an eruption in this area; status is being raised to ORANGE/WATCH.
2024-08-30 17:00:05 UTC, Shishaldin GREEN
AVO Shishaldin GREEN/NORMAL - Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
2024-08-30 17:00:05 UTC, Shishaldin GREEN
AVO Shishaldin GREEN/NORMAL - Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
2024-07-23 19:04:45 UTC, Kilauea YELLOW
HVO Kilauea YELLOW/ADVISORY - Kīlauea upper East Rift Zone unrest has decreased in intensity; status is being lowered to YELLOW/ADVISORY.
2024-07-23 19:04:45 UTC, Kilauea YELLOW
HVO Kilauea YELLOW/ADVISORY - Kīlauea upper East Rift Zone unrest has decreased in intensity; status is being lowered to YELLOW/ADVISORY.
2024-07-23 14:06:02 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea upper East Rift Zone elevated unrest; status is being raised to ORANGE/WATCH.
2024-07-23 14:06:02 UTC, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Kīlauea upper East Rift Zone elevated unrest; status is being raised to ORANGE/WATCH.
2024-07-08 20:54:04 UTC, Cleveland GREEN
AVO Cleveland GREEN/NORMAL - Aviation Color Code/Volcano Alert Level lowered to GREEN/NORMAL.
2024-07-08 20:54:04 UTC, Cleveland GREEN
AVO Cleveland GREEN/NORMAL - Aviation Color Code/Volcano Alert Level lowered to GREEN/NORMAL.
2024-07-08 20:52:29 UTC, Aniakchak GREEN
AVO Aniakchak GREEN/NORMAL - Monitoring stations online again, Aviation Color Code and Volcano Alert Level changed to GREEN/NORMAL.
2024-07-08 20:52:29 UTC, Aniakchak GREEN
AVO Aniakchak GREEN/NORMAL - Monitoring stations online again, Aviation Color Code and Volcano Alert Level changed to GREEN/NORMAL.
2024-07-05 22:54:00 UTC, Cleveland YELLOW
AVO Cleveland YELLOW/ADVISORY - Sulfur dioxide emissions detected. Aviation Color Code/Volcano Alert Level upgraded to YELLOW/ADVISORY.
2024-07-05 22:54:00 UTC, Cleveland YELLOW
AVO Cleveland YELLOW/ADVISORY - Sulfur dioxide emissions detected. Aviation Color Code/Volcano Alert Level upgraded to YELLOW/ADVISORY.
Occassionally, aviation notices will not be issued even though a VAN (volcanic activity notice) has been issued. This can happen when there is surface-based activity, but no airborne component.