Arenal (Costa Rica)

Active block flow overrides 1974 flows and buries monitoring stations

Erebus (Antarctica)

Vigorous convection in 100-m-diameter anorthoclase phonolite lava lake

Matthew Island (New Caledonia, Vanuatu)

Additional details from 27 November observation flight

Nyiragongo (DR Congo)

Effusive eruption towards the SE engulfs two villages; significant number of deaths

Soufriere Guadeloupe (Guadeloupe, West Indies)

Summary of steam-and-ash explosions during October 1976-January 1977

Minami-Hiyoshi (Volcano Islands, Japan)

Bubbling water and discoloration

Kasuga (Volcano Islands, Japan)

Possible submarine eruption in November 1975

Fukujin (Volcano Islands, Japan)

Possible submarine eruption in March 1974

Fukutoku-Okanoba (Volcano Islands, Japan)

Possible submarine eruption in December 1974

Iwo-jima (Volcano Islands, Japan)

Possible submarine eruption 26 km NW of the island in January 1974

Unnamed (Ogasawara Plateau, Pacific Ocean)

Possible submarine eruption in March 1974

Tori-shima (Izu Islands, Japan)

Possible submarine eruption in October 1975

White Island (New Zealand)

Explosive steam-and-ash eruptions form new craters

Krafla (Iceland)

Details of seismicity and deformation associated with 20 January magma intrusion

Pavlof (Alaska, USA)

Decreased seismicity; small steam emissions

Arenal (Costa Rica)

Map showing currently active lava flows

Minami-Hiyoshi (Volcano Islands, Japan)

Two zones of discolored water observed from the air

Fukujin (Volcano Islands, Japan)

Zone of discolored water observed from the air

Nyamuragira (DR Congo)

Additional information about late-December 1976 activity

Nyiragongo (DR Congo)

Additional details about 10 January fissure eruption

Sakura-jima (Kyushu, Japan)

Summit explosions continue; lapilli-fall breaks car windows

Santa Maria (western Guatemala)

Ash emission increases; ashfall zone extends 70 km to the coast

Soufriere Guadeloupe (Guadeloupe, West Indies)

Phreatic activity continues; large explosion on 29 January

White Island (New Zealand)

Vigorous eruptions through mid-February

Bezymianny (Kamchatka Peninsula, Russia)

Explosions in late March send tephra clouds to 15 km altitude

Fernandina (Galapagos Islands, Ecuador)

Fissure lava eruption during 23-27 March

Fuego (Guatemala)

Steam plume from a S-flank vent

Kavachi (Solomon Islands)

Eruptive activity observed in October 1976 and February 1977

Merapi (Java, Indonesia)

Lava dome growth continues; frequent avalanches

Nyamuragira (DR Congo)

Lava flows from a new cone on the S flank

Nyiragongo (DR Congo)

Investigation shows that lava lake drained through flank fissures

Pavlof (Alaska, USA)

Some steaming and ash near the summit

Puracé (Colombia)

Eruption drops ash 7 km away on 19 March

Sakura-jima (Kyushu, Japan)

Explosive activity continues

Seguam (Aleutian Islands, USA)

Lava fountaining from a 1-km-long rift seen on 6 March

Semeru (Java, Indonesia)

Long-running eruption continues typical activity

Shishaldin (Aleutian Islands, USA)

Light steaming seen on one day in February

Soufriere Guadeloupe (Guadeloupe, West Indies)

Earthquake rate decreases to 1 per day

Ukinrek Maars (Alaska, USA)

Explosions send ash plume above 6 km height

Krafla (Iceland)

Inflation begins again along with an increase in seismicity

Nasu (Honshu, Japan)

Earthquake swarm with felt events

Karthala (Comoros)

Effusive eruption in early April causes evacuations

Concepcion (Nicaragua)

Eruption on 4 April followed by weeks of frequent small ash explosions

Fuego (Guatemala)

Small ash eruption on 19 April

Minami-Hiyoshi (Volcano Islands, Japan)

Zone of discolored water seen on 27-28 March

Fukutoku-Okanoba (Volcano Islands, Japan)

Water discoloration observed during August 1976

Kadovar (Offshore New Guinea, Papua New Guinea)

Thermal activity stabilizes

Karthala (Comoros)

Lava extrusion during 5-10 April eruption destroys three villages

Kilauea (Hawaii, USA)

Monitoring data from 8-9 February magma intrusion event

Manam (Bismarck Sea, Papua New Guinea)

Minor eruptive activity from two craters since mid-February

Nyiragongo (DR Congo)

Photographs of 10 January lavas

Pavlof (Alaska, USA)

Ashfall darkens snow near the summit on 22 March

Piton de la Fournaise (Reunion Island)

Summary of first flank activity since 1800

Puracé (Colombia)

Another ash emission seen on 25 March

Sakura-jima (Kyushu, Japan)

Only four explosions observed in March

Soufriere Guadeloupe (Guadeloupe, West Indies)

Decreased seismic and surface activity

Ukinrek Maars (Alaska, USA)

Two new maars formed NW of Peulik volcano after 30 March

White Island (New Zealand)

Ash eruptions continuing in late March-early April

Krafla (Iceland)

Fissure eruption on 27 April causes ash fall and lava flows

Akutan (Aleutian Islands, USA)

Ash eruptions observed in early May

Aso (Kyushu, Japan)

Gas emissions increase; minor tephra ejections

Piton de la Fournaise (Reunion Island)

Lava extrusion ends, but one flow moved through a village

Sakura-jima (Kyushu, Japan)

Three explosions in April; one causes minor ashfall

Santa Maria (western Guatemala)

Strong pyroclastic activity with ash clouds rising more than 6 km

Soufriere Guadeloupe (Guadeloupe, West Indies)

Fumarolic activity

Suwanose-jima (Ryukyu Islands, Japan)

Frequent explosions and considerable ashfall

Ukinrek Maars (Alaska, USA)

Periodic earthquake swarms near the new vents

White Island (New Zealand)

Aerial inspection on 5 May revealed steam-and-ash column above Christmas Crater

Krafla (Iceland)

Decline in seismicity following deflation event much less than after prior episodes

Aso (Kyushu, Japan)

Minor ash emission in mid-May

Sakura-jima (Kyushu, Japan)

More frequent explosions in May

Soufriere Guadeloupe (Guadeloupe, West Indies)

Summary of seismicity since mid-1975

Suwanose-jima (Ryukyu Islands, Japan)

Explosions continue but are less frequent

White Island (New Zealand)

New ash deposits

Krafla (Iceland)

Steady inflation as seismicity continues to decrease

Aso (Kyushu, Japan)

Gas and tephra emissions; several people injured

Etna (Sicily, Italy)

Lava effusion and explosive activity from a new vent

Kadovar (Offshore New Guinea, Papua New Guinea)

No significant changes in the thermal area

Matthew Island (New Caledonia, Vanuatu)

Photograph from 11 February showing the vent

Sakura-jima (Kyushu, Japan)

Explosions send columns up to 2.7 km height

Krafla (Iceland)

Continued inflation; significant increase in gas discharge

Kavachi (Solomon Islands)

Renewed activity

Aso (Kyushu, Japan)

Activity declines after 22 July

Etna (Sicily, Italy)

Two eruptions in August generate fountaining and lava flows

Fukutoku-Okanoba (Volcano Islands, Japan)

Sea surface discoloration in May

Pacaya (Guatemala)

Ash eruptions on 19-20 and 27 August

Piton de la Fournaise (Reunion Island)

Photographs of a lava flow and a damaged church

Sakura-jima (Kyushu, Japan)

Explosions accompanied by ashfall, scoria ejection, and other activity

Suwanose-jima (Ryukyu Islands, Japan)

Eruptions continue; considerable ash deposition

Usu (Hokkaido, Japan)

Major eruption on 7 August from a new vent

White Island (New Zealand)

Entire island covered in ash in late July

Krafla (Iceland)

Inflation continues; steam explosions on 2 August

Fuego (Guatemala)

Ash emission almost continuous during 12-13 September

Kilauea (Hawaii, USA)

Fissure eruption begins on the East Rift near Kalalua Crater

Sakura-jima (Kyushu, Japan)

Minor ashfalls from explosions; falling scoria starts forest fire

Usu (Hokkaido, Japan)

Cryptodome rises to 70 m by late September

White Island (New Zealand)

Large eruptions on 25 August; lithic blocks ejected

Krafla (Iceland)

Deflation accompanied by a basaltic eruption and fault movements

Fuego (Guatemala)

Steam and ash emission continues intermittently through late October

Kilauea (Hawaii, USA)

Eruption near the Kalalua cone ends on 1 October

Pacaya (Guatemala)

Steam and ash emission increase

Piton de la Fournaise (Reunion Island)

New eruption emits lava flow towards uninhabited area

Sakura-jima (Kyushu, Japan)

Explosions accompanied by airshocks and scoria ejection

San Cristobal (Nicaragua)

Small ash eruption

Suwanose-jima (Ryukyu Islands, Japan)

Activity continued during August and September

Taal (Luzon, Philippines)

Weak phreatic eruption with harmonic tremor

Monowai Seamount (Kermadec Islands, SW Pacific Ocean)

Water discoloration extending 5 km from area of brown turbulence

Usu (Hokkaido, Japan)

Continued cryptodome uplift and weak emission of steam clouds

White Island (New Zealand)

Weak ash column seen on 9 October, but no major explosions

Krafla (Iceland)

Inflation resumes

Etna (Sicily, Italy)

Eruption from the NE crater, the fourth since mid-July

Fuego (Guatemala)

Increased activity continues through mid-November

Kadovar (Offshore New Guinea, Papua New Guinea)

Few changes in the main thermal area; no volcano-seismic activity

Mayon (Luzon, Philippines)

Summit crater glow seen in early November; several new steam vents

Piton de la Fournaise (Reunion Island)

Two fissures open in late October and emit lava flows

Ruapehu (North Island, New Zealand)

Moderate phreato-magmatic eruption from Crater Lake on 2 November

Sakura-jima (Kyushu, Japan)

Explosion on 28 November breaks 60 windows in buildings on the S flank

Taal (Luzon, Philippines)

Ejection of voluminous ash-laden steam clouds on 9 November

Telica (Nicaragua)

Explosions observed in late November

Usu (Hokkaido, Japan)

Small steam explosion from three new vents on 16 November

White Island (New Zealand)

Ash eruptions continue during November

Katla (Iceland)

Annual seismic energy release, 1970-September 1977

Krafla (Iceland)

Harmonic tremor, deflation, and increased geothermal activity

Oshima (Izu Islands, Japan)

Earthquake swarm in late October through mid-November

Aso (Kyushu, Japan)

Ash eruptions continue through November with some substantial ashfall

Erebus (Antarctica)

No apparent change in the lava lake; two small Strombolian eruptions

Etna (Sicily, Italy)

Frequent eruptions from Northeast Crater continued into January

Fuego (Guatemala)

Intermittent black ash emissions and glow

Poás (Costa Rica)

Eruption covers a large area on the flanks of the volcano with mud

Sakura-jima (Kyushu, Japan)

Explosion air shocks break about 100 windows 3 km south of the summit

Telica (Nicaragua)

Explosion frequency declines

Usu (Hokkaido, Japan)

Weak steam emission through November

White Island (New Zealand)

Seismogram analyses for 30 August-15 November

Krafla (Iceland)

Inflation continues at a rate similar to previous months