Hazard Notification System (HANS) for Volcanoes
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Volcanic aviation notices published in the last year.
8/23/2025 1:23:39 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 31 of the ongoing Halemaʻumaʻu eruption ended abruptly at 2:52 a.m.HST on August 23.
8/23/2025 1:23:39 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 31 of the ongoing Halemaʻumaʻu eruption ended abruptly at 2:52 a.m.HST on August 23.
8/23/2025 12:16:42 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 31 of the ongoing Halemaʻumaʻu eruption began at 2:04 p.m. HST on August 22.
8/23/2025 12:16:42 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 31 of the ongoing Halemaʻumaʻu eruption began at 2:04 p.m. HST on August 22.
8/20/2025 6:07:51 PM, Spurr GREEN
AVO Spurr GREEN/NORMAL - Volcanic unrest has decreased over past several months. Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
8/20/2025 6:07:51 PM, Spurr GREEN
AVO Spurr GREEN/NORMAL - Volcanic unrest has decreased over past several months. Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
8/6/2025 11:23:45 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 30 of the ongoing Halemaʻumaʻu eruption ended abruptly at 12:55 p.m. HST on August 6
8/6/2025 11:23:45 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 30 of the ongoing Halemaʻumaʻu eruption ended abruptly at 12:55 p.m. HST on August 6
8/6/2025 12:06:00 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 30 fountaining of the ongoing Halemaʻumaʻu eruption began at 1:20 a.m HST on August 6.
8/6/2025 12:06:00 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 30 fountaining of the ongoing Halemaʻumaʻu eruption began at 1:20 a.m HST on August 6.
7/24/2025 12:47:31 AM, Ahyi Seamount UNASSIGNED
NMI Ahyi Seamount UNASSIGNED/UNASSIGNED - No sign of continued submarine eruption; Aviation Color Code and Volcano Alert Level lowered to UNASSIGNED.
7/24/2025 12:47:31 AM, Ahyi Seamount UNASSIGNED
NMI Ahyi Seamount UNASSIGNED/UNASSIGNED - No sign of continued submarine eruption; Aviation Color Code and Volcano Alert Level lowered to UNASSIGNED.
7/21/2025 4:59:17 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 29 of the ongoing Halemaʻumaʻu eruption ended abruptly around 6:35 p.m. HST on July 20.
7/21/2025 4:59:17 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 29 of the ongoing Halemaʻumaʻu eruption ended abruptly around 6:35 p.m. HST on July 20.
7/20/2025 3:29:49 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 29 high fountains of the ongoing Halemaʻumaʻu eruption began around 5:15 a.m. HST on July 20.
7/20/2025 3:29:49 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 29 high fountains of the ongoing Halemaʻumaʻu eruption began around 5:15 a.m. HST on July 20.
7/9/2025 11:49:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 28 of the ongoing Halemaʻumaʻu eruption ended abruptly at 1:20 p.m. HST on July 9, 2025.
7/9/2025 11:49:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 28 of the ongoing Halemaʻumaʻu eruption ended abruptly at 1:20 p.m. HST on July 9, 2025.
7/9/2025 3:11:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 28 of the ongoing Halemaʻumaʻu eruption began at 4:10 a.m. HST on July 9, 2025.
7/9/2025 3:11:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 28 of the ongoing Halemaʻumaʻu eruption began at 4:10 a.m. HST on July 9, 2025.
7/1/2025 7:41:44 PM, Iliamna GREEN
AVO Iliamna GREEN/NORMAL - Aviation Color Code and Volcano Alert Level changed to GREEN/NORMAL from UNASSIGNED
7/1/2025 7:41:44 PM, Iliamna GREEN
AVO Iliamna GREEN/NORMAL - Aviation Color Code and Volcano Alert Level changed to GREEN/NORMAL from UNASSIGNED
6/30/2025 6:20:06 AM, 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).
6/30/2025 6:20:06 AM, 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).
6/29/2025 7:31:07 PM, 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.
6/29/2025 7:31:07 PM, 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.
6/28/2025 6:50:19 PM, 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.
6/28/2025 6:50:19 PM, 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.
6/20/2025 8:58:41 PM, 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.
6/20/2025 8:58:41 PM, 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.
6/20/2025 12:10:34 PM, 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.
6/20/2025 12:10:34 PM, 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.
6/20/2025 9:54:33 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Low-level precursory activity started within Halemaʻumaʻu at 11:26 p.m. HST on 6/19/2025.
6/20/2025 9:54:33 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Low-level precursory activity started within Halemaʻumaʻu at 11:26 p.m. HST on 6/19/2025.
6/12/2025 6:27:42 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption ended at 8:08 p.m. HST on June 11, 2025.
6/12/2025 6:27:42 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption ended at 8:08 p.m. HST on June 11, 2025.
6/11/2025 10:39:28 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption began at 11:57 a.m. HST on June 11, 2025.
6/11/2025 10:39:28 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 of the ongoing Halemaʻumaʻu eruption began at 11:57 a.m. HST on June 11, 2025.
6/10/2025 5:56:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 precursory activity started within Halemaʻumaʻu on the morning of June 10.
6/10/2025 5:56:51 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 25 precursory activity started within Halemaʻumaʻu on the morning of June 10.
6/5/2025 3:37:45 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption ended abruptly at 4:28 a.m. HST on June 5.
6/5/2025 3:37:45 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption ended abruptly at 4:28 a.m. HST on June 5.
6/5/2025 8:51:18 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption began at 8:55 PM HST on June 4.
6/5/2025 8:51:18 AM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 of the ongoing Halemaʻumaʻu eruption began at 8:55 PM HST on June 4.
6/3/2025 10:36:19 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 precursory activity started within Halemaʻumaʻu during the morning on June 3
6/3/2025 10:36:19 PM, Kilauea ORANGE
HVO Kilauea ORANGE/WATCH - Episode 24 precursory activity started within Halemaʻumaʻu during the morning on June 3
5/5/2025 8:00:48 PM, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further exposlive activity observed.
5/5/2025 8:00:48 PM, Atka volcanic complex GREEN
AVO Atka volcanic complex GREEN/NORMAL - No further exposlive activity observed.
4/25/2025 9:47:41 PM, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - Small explosion detected in geophysical data at 10:34 AKDT April 25.
4/25/2025 9:47:41 PM, Atka volcanic complex YELLOW
AVO Atka volcanic complex YELLOW/ADVISORY - Small explosion detected in geophysical data at 10:34 AKDT April 25.
3/3/2025 11:52:27 PM, 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
3/3/2025 11:52:27 PM, 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
2/21/2025 8:14:55 PM, 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
2/21/2025 8:14:55 PM, 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
2/21/2025 6:11:07 AM, 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.
2/21/2025 6:11:07 AM, 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.
1/29/2025 2:01:57 AM, Okmok UNASSIGNED
AVO Okmok UNASSIGNED/UNASSIGNED - Major network outage due to power system degradation.
1/29/2025 2:01:57 AM, Okmok UNASSIGNED
AVO Okmok UNASSIGNED/UNASSIGNED - Major network outage due to power system degradation.
12/23/2024 4:43:22 PM, 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.
12/23/2024 4:43:22 PM, 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.
12/23/2024 12:41:27 PM, Kilauea RED
HVO Kilauea RED/WARNING - Kīlauea is erupting within the summit caldera, status is being raised from ADVISORY/YELLOW to RED/WARNING.
12/23/2024 12:41:27 PM, Kilauea RED
HVO Kilauea RED/WARNING - Kīlauea is erupting within the summit caldera, status is being raised from ADVISORY/YELLOW to RED/WARNING.
11/19/2024 11:43:33 PM, 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..
11/19/2024 11:43:33 PM, 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..
10/16/2024 8:07:39 PM, 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.
10/16/2024 8:07:39 PM, 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.
10/1/2024 6:04:56 PM, Wrangell GREEN
AVO Wrangell GREEN/NORMAL - The seismic network on Mount Wrangell volcano is now functioning.
10/1/2024 6:04:56 PM, Wrangell GREEN
AVO Wrangell GREEN/NORMAL - The seismic network on Mount Wrangell volcano is now functioning.
9/23/2024 6:12:18 PM, 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.
9/23/2024 6:12:18 PM, 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.
9/16/2024 10:23:58 AM, 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.
9/16/2024 10:23:58 AM, 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.
8/30/2024 5:00:05 PM, Shishaldin GREEN
AVO Shishaldin GREEN/NORMAL - Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
8/30/2024 5:00:05 PM, Shishaldin GREEN
AVO Shishaldin GREEN/NORMAL - Aviation Color Code and Volcano Alert Level decreased to GREEN/NORMAL
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.