[{"noticeHtml":"\u003Ch4\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/h4\u003E\u003Cpre\u003EWMAK01 PAVO 250019   \nVONA\nDTG:                    20260725\/0019Z\nVOLCANO:                KATMAI 312170\nPSN:                    N5817 W15457\nAREA:                   ALASKA\nSOURCE ELEV:            6716FT AMSL\nNOTICE NR:              2026\/03\nCURRENT COLOUR CODE:    GREEN\nPREVIOUS COLOUR CODE:   GREEN\nSVO:                    ALASKA VOLCANO OBSERVATORY\nACT STS:                RE-SUSPENDED VA\nONSET:                  NIL\nDUR:                    NIL\nVA CLD HGT:             6000FT AMSL\nHGT SOURCE:             SIGMET\nMOV:                    SE\nCTC:                    AVO DUTY SCIENTIST TEL +1-907-786-7497\nRMK:                    NO ERUPTION. RESUSPENDED VA FROM GND LEVEL ONLY. SEE SIGMET FOR MORE INFO.\nNXT NOTICE:             A NEW VONA WILL BE ISSUED IF COND CHANGE SIGNIFICANTLY OR IF THE COLOR CODE CHANGES\nNNNN\u003C\/pre\u003E","noticeSynopsis":"Resuspended ash observed from 1912 eruption. Aviation color code and alert level remain at GREEN\/NORMAL.","sentUtc":"2026-07-25","obs":"avo","vName":"Katmai","vnum":"312170","noticeId":"DOI-USGS-AVO-2026-03-06T00:26:58+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2026-03-06T00:26:58+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2026-03-06T00:26:58+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ch4\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/h4\u003E\u003Cpre\u003EWMAK01 PAVO 212008   \nVONA\nDTG:                    20260721\/2008Z\nVOLCANO:                ATKA VOLCANIC COMPLEX 311160\nPSN:                    N5220 W17408\nAREA:                   ALASKA\nSOURCE ELEV:            5030FT AMSL\nNOTICE NR:              2026\/05\nCURRENT COLOUR CODE:    GREEN\nPREVIOUS COLOUR CODE:   YELLOW\nSVO:                    ALASKA VOLCANO OBSERVATORY\nACT STS:                NIL\nONSET:                  NIL\nDUR:                    NIL\nVA CLD HGT:             NO VA CLD PRODUCED\nHGT SOURCE:             NO VA CLD PRODUCED\nMOV:                    NO VA CLD PRODUCED\nCTC:                    MATT HANEY SIC, USGS MHANEY@USGS.GOV (907) 786-7497 DAVID FEE, COORDINATING\n                        SCIENTIST, UAFGI, DFEE1@A...\nRMK:                    UNREST DECLINED.\nNXT NOTICE:             A NEW VONA WILL BE ISSUED IF COND CHANGE SIGNIFICANTLY OR IF THE COLOR CODE CHANGES\nNNNN\u003C\/pre\u003E","noticeSynopsis":"Unrest has declined. Color Code and Alert Level Level lowered to GREEN\/NORMAL.","sentUtc":"2026-07-21","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2026-07-21T18:52:50+00:00","colorCode":"GREEN","alertLevel":"NORMAL","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2026-07-21T18:52:50+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2026-07-21T18:52:50+00:00","nvewsThreat":"High Threat"},{"noticeHtml":"\u003Ch4\u003EVOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)\u003C\/h4\u003E\u003Cpre\u003EWMAK01 PAVO 161303   \nVONA\nDTG:                    20260716\/1303Z\nVOLCANO:                ATKA VOLCANIC COMPLEX 311160\nPSN:                    N5220 W17408\nAREA:                   ALASKA\nSOURCE ELEV:            5030FT AMSL\nNOTICE NR:              2026\/04\nCURRENT COLOUR CODE:    YELLOW\nPREVIOUS COLOUR CODE:   GREEN\nSVO:                    ALASKA VOLCANO OBSERVATORY\nACT STS:                ERUPTION OCCURRED\nONSET:                  20260716\/1155Z\nDUR:                    10 MIN\nVA CLD HGT:             UNKNOWN\nHGT SOURCE:             SATELLITE\nMOV:                    NO VA CLD PRODUCED\nCTC:                    MATT HANEY SIC, USGS MHANEY@USGS.GOV (907) 786-7497 JESS LARSEN, ACTING-CS, UAFGI\n                        JFLARSEN@ALASKA.EDU...\nRMK:                    SMALL EXPLOSION DETECTED FROM KOROVIN VOLCANO. NO VA OBS ABV LOW MET CLD. NO ONGOING\n                        ACTIVITY EXPECTED.\nNXT NOTICE:             A NEW VONA WILL BE ISSUED IF COND CHANGE SIGNIFICANTLY OR IF THE COLOR CODE CHANGES\nNNNN\u003C\/pre\u003E","noticeSynopsis":"Small phreatic (steam) explosion detected, Color Code and Alert Level raised to YELLOW\/ADVISORY.","sentUtc":"2026-07-16","obs":"avo","vName":"Atka volcanic complex","vnum":"311160","noticeId":"DOI-USGS-AVO-2026-07-16T12:42:57+00:00","colorCode":"YELLOW","alertLevel":"ADVISORY","noticeUrl":"https:\/\/volcanoes.usgs.gov\/hans2\/view\/notice\/DOI-USGS-AVO-2026-07-16T12:42:57+00:00","noticeData":"https:\/\/volcanoes.usgs.gov\/vsc\/api\/hansApi\/notice\/DOI-USGS-AVO-2026-07-16T12:42:57+00:00","nvewsThreat":"High Threat"}]