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What was erupting in the year...?

There were 69 confirmed eruptions at some point during 1999 from 66 different volcanoes; 38 of those were new eruptions that started during the year. A stop date with "(continuing)" indicates that the eruption was considered to be ongoing as of the date indicated. Data is reported through the last data update (11 July 2019). Information about more recent eruptions can be found in the Smithsonian / USGS Weekly Volcanic Activity Report.

Volcano Country Eruption Start Date Eruption Stop Date Max VEI
Concepcion Nicaragua 1999 Dec 27 1999 Dec 29 (?) 1
Masaya Nicaragua 1999 Nov 22 2000 Mar 2 (?) 1
Kavachi Solomon Islands 1999 Nov 16 (?) ± 15 days 2003 Aug 16 ± 15 days 1
Ulawun Papua New Guinea 1999 Oct 20 1999 Oct 20 1
Moyorodake [Medvezhia] Japan - administered by Russia 1999 Oct 7 1999 Oct 13 1
Tungurahua Ecuador 1999 Oct 5 2009 Jul 8 ± 7 days 3
Ioto Japan 1999 Sep 10 1999 Sep 10 1
Sheveluch Russia 1999 Aug 15 2019 Jul 11 (continuing) 4
Cerro Negro Nicaragua 1999 Aug 5 1999 Aug 7 2
Raung Indonesia 1999 Jul 30 Unknown 2
Piton de la Fournaise France 1999 Jul 19 1999 Oct 23 1
Ijen Indonesia 1999 Jun 28 1999 Jun 28 1
Mayon Philippines 1999 Jun 22 2000 Mar 19 3
Suwanosejima Japan 1999 Jun 15 ± 5 days 1999 Jun 30 ± 4 days 1
Monowai New Zealand 1999 Jun 6 1999 Jun 11 0
Iliwerung Indonesia 1999 May 22 1999 Sep 16 (in or after) ± 15 days 0
Telica Nicaragua 1999 May 21 2000 Sep 6 2
Fuego Guatemala 1999 May 21 2000 Dec 9 (in or after) 2
Tinakula Solomon Islands 1999 May 16 ± 15 days Unknown 1
San Cristobal Nicaragua 1999 May 1 ± 180 days 2000 Jun 16 ± 15 days 2
Slamet Indonesia 1999 May 1 (?) 1999 Sep 16 (?) ± 15 days 1
Marapi Indonesia 1999 Apr 16 (in or before) ± 15 days 1999 Sep 16 (in or after) ± 15 days 2
East Gakkel Ridge at 85°E Undersea Features 1999 Apr 5 (?) 1999 Apr 15 (?) 2
Sheveluch Russia 1999 Apr 3 1999 Apr 12 2
Lewotobi Indonesia 1999 Mar 31 1999 Jul 1 (?) 2
Cameroon Cameroon 1999 Mar 28 1999 Apr 17 2
Karangetang Indonesia 1999 Mar 16 (in or before) ± 15 days 2003 Oct 28 3
Kerinci Indonesia 1999 Mar 16 (in or before) ± 15 days 1999 Sep 16 (in or after) ± 15 days 2
Batur Indonesia 1999 Mar 15 2000 Jun 16 (?) ± 15 days 1
Shishaldin United States 1999 Mar 13 1999 May 27 3
Peuet Sague Indonesia 1999 Mar 9 (?) 1999 Apr 30 ± 3 days 1
Bezymianny Russia 1999 Feb 25 1999 Feb 25 2
Kavachi Solomon Islands 1999 Feb 16 ± 15 days 1999 May 16 ± 15 days 1
Krakatau Indonesia 1999 Feb 5 1999 Aug 16 (in or after) ± 15 days 2
Klyuchevskoy Russia 1999 Feb 5 1999 Jul 12 2
Epi Vanuatu 1999 Feb 1 (?) ± 30 days Unknown 1
Unnamed Tonga 1999 Jan 8 (in or before) 1999 Jan 14 (?) 1
Suwanosejima Japan 1999 Jan 5 ± 5 days 1999 Feb 24 ± 4 days 1
Ibu Indonesia 1998 Dec 18 1999 Sep 16 (in or after) ± 15 days 2
Terceira Portugal 1998 Nov 25 (?) 2000 Mar 16 (?) ± 15 days 0
White Island New Zealand 1998 Aug 22 1999 Aug 16 ± 15 days 2
Guagua Pichincha Ecuador 1998 Aug 7 2001 May 25 3
Lopevi Vanuatu 1998 Jul 16 ± 15 days 2000 Apr 25 (?) 3
Kikai Japan 1998 Apr 25 1999 Aug 16 ± 15 days 2
Villarrica Chile 1998 Feb 24 ± 4 days 2002 Jun 16 (?) ± 15 days 1
Colima Mexico 1997 Nov 22 2011 Jun 21 3
Sangeang Api Indonesia 1997 Jul 2 ± 182 days 1999 Jul 2 ± 182 days 2
Ambrym Vanuatu 1996 Jun 16 (in or before) ± 15 days 2005 Aug 16 (in or after) ± 15 days 1
Popocatepetl Mexico 1996 Mar 5 2003 Nov 22 (?) 3
Karymsky Russia 1996 Jan 2 2000 Dec 20 (?) 3
Rabaul Papua New Guinea 1995 Nov 28 2001 Sep 5 ± 4 days 2
Soufriere Hills United Kingdom 1995 Jul 18 2003 Oct 8 3
Ol Doinyo Lengai Tanzania 1994 Sep 18 2006 Jul 16 (?) ± 15 days 1
Etna Italy 1994 Jun 17 2001 Jul 17 3
Merapi Indonesia 1992 Jan 20 2002 Oct 19 (?) 2
Pacaya Guatemala 1990 Jan 4 (?) 2000 Mar 1 3
Kilauea United States 1983 Jan 3 2018 Sep 5 3
Manam Papua New Guinea 1974 Mar 4 (?) 1999 Nov 9 (?) 3
Langila Papua New Guinea 1973 Feb 24 ± 4 days 2000 Oct 16 (in or after) ± 15 days 3
Erebus Antarctica 1972 Dec 16 (in or before) ± 15 days 2019 Jul 8 (continuing) 2
Arenal Costa Rica 1968 Jul 29 2010 Dec 16 (?) ± 15 days 3
Semeru Indonesia 1967 Aug 31 2009 Mar 15 3
Erta Ale Ethiopia 1967 Jul 2 (in or before) ± 182 days 2019 Jul 7 (continuing) 0
Aira Japan 1955 Oct 13 2016 Aug 22 3
Sangay Ecuador 1934 Aug 8 2011 Mar 2 3
Stromboli Italy 1934 Feb 2 2019 Jul 11 (continuing) 2
Dukono Indonesia 1933 Aug 13 2019 Jul 11 (continuing) 3
Santa Maria Guatemala 1922 Jun 22 2019 Jul 11 (continuing) 3
Yasur Vanuatu 1774 Jul 2 (in or before) ± 182 days 2019 Jul 11 (continuing) 3

List of Questions

Global Volcanism Program, 2013. Volcanoes of the World, v. 4.8.2. Venzke, E (ed.). Smithsonian Institution. Downloaded 22 Aug 2019. https://doi.org/10.5479/si.GVP.VOTW4-2013