Fuego (Guatemala) (Event 171-74) [North American Stratospheric Dust Incidence]

Card 2043 (10 January 1975) Optical effects at sunset indicate volcanic dust in the atmosphere

Karkar (Papua New Guinea) (Event 03-75)

Card 2056 (21 January 1975) Moderate ash ejections and lava flows from Bagiai Cone

Kilauea (Hawaii, USA) (Event 04-75)

Card 2065 (31 January 1975) Lava fountains from a fissure eruption send flows 12 km

Etna (Italy) (Event 10-75)

Card 2092 (24 February 1975) Eruption on NW flank produces spatter cones and lava flows

Tongariro (North Island, New Zealand) (Event 19-75)

Card 2119-2120 (12 March 1975) Strong explosive ash eruptions during 12-19 February

Etna (Italy) (Event 10-75)

Card 2124 (19 March 1975) New eruptive center on the North Rift zone

Fukutoku-Okanoba (Volcano Islands, Japan) (Event 24-75)

Card 2130 (28 March 1975) Eruption building new island

Baker (Washington, USA) (Event 26-75)

Card 2132 (28 March 1975) Increased fumarolic activity and new fumaroles

Jan Mayen (North Atlantic Ocean, Jan Mayen Island, Norway) (Event 29-75)

Card 2151 (16 April 1975) Large earthquake near Jan Mayen island

Esmeralda Bank (Mariana Islands, central Pacific Ocean) (Event 38-75)

Card 2185 (15 May 1975) Bubbling and boiling at the ocean surface, water discoloration

Ruapehu (North Island, New Zealand) (Event 40-75)

Card 2190 (21 May 1975) Major eruption on 24 April; lahars and ashfall     

Arenal (Costa Rica) (Event 46-75)

Card 2200 (20 June 1975) New crater forms; lake ejected

Karymsky (Kamchatka Peninsula) (Event 46-75)

Card 2201 (23 June 1975) Explosion on 10 May sends plume 1.5 km high

Mauna Loa (Hawaii, USA) (Event 48-75)

Card 2212 (07 July 1975) Lava fountains in the summit caldera and along two rift zones

Sangay (Ecuador) (Event 50-75)

Card 2214 (08 July 1975) Continued activity; block lava flows and ash emissions

Tolbachik (Kamchatka Peninsula) (Event 51-75)

Card 2216 (08 July 1975) Explosions from four flank vents of Plosky Tolbachik

Baker (Washington, USA) (Event 26-75)

Card 2219 (14 July 1975) Aerial observations; new crater lake

Card 2227 (21 July 1975) Rapid melting of ice and snow

Baker (Washington, USA) (Event 26-75)

Card 2244 (07 August 1975) Continued high fumarolic activity; clusters of hundred of new fumaroles

Tolbachik (Kamchatka Peninsula) (Event 51-75)

Card 2245 (07 August 1975) Ash and lava emission from new cone on the S slope of Plosky Tolbachik

Fuego (Guatemala) (Event 134-74)

Card 2263 (25 August 1975) Sporadic explosions and ashfall through 4 August

Cotopaxi (Ecuador)

Vapor plumes rising above the crater in September and October

Fuego (Guatemala)

Occasional ash emissions in September and October

Sakura-jima (Kyushu, Japan)

Typical explosive eruptions

Pavlof (Alaska, USA)

Columns of "smoke" to 2,400 m

Shishaldin (Aleutian Islands, USA)

Ash eruptions; continuous activity in September and into October

Cotopaxi (Ecuador)

Continued vapor emanations in November

Etna (Sicily, Italy)

Continuous activity for most of 1975; new lava vent

Kilauea (Hawaii, USA)

Lava fountains following a severe earthquake

Piton de la Fournaise (Reunion Island)

Eruption begins on 4 November after 31-month repose

Stromboli (Italy)

Effusive activity began on 5 November; lava reaches the northern coast

Pavlof (Alaska, USA)

Ash eruptions, lava emission, and orange glow

Shishaldin (Aleutian Islands, USA)

White steam seen during clear weather

Cotopaxi (Ecuador)

Activity declines

Colima (western México)

Eruption begins on 1 December; lava flows

Krafla (Iceland)

Minor steam eruption and lava flow