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Lava flows from the 1984 eruption of Mauna Loa loom above the town ...
April 4, 1984

Lava flows from the 1984 eruption of Mauna Loa loom above the town ...

Lava flows from the 1984 eruption of Mauna Loa loom above the town of Hilo. Photograph taken near the Hilo airport on April 4.

April 2, 1984

Mauna Loa Lava Flow, April 2, 1984

A USGS scientist walks along a lava flow from the April 2, 1984 Mauna Loa eruption. The scientist stops to observe a standing wave of lava at the end. The lava flow is moving at 64 km/hr (40 mph) towards Hilo, Hawai'i. 
 

Image: Lava flows on Mauna Loa
March 25, 1984

Lava flows on Mauna Loa

Erupting vents on Mauna Loa’s northeast rift zone near Pu‘u‘ula‘ula (Red Hill) on Mar. 25, 1984, sent massive ‘a‘ā lava flows down the rift toward Kūlani.

Lava fountains erupting from fissure on upper northeast rift zone o...
March 25, 1984

Lava fountains erupting from fissure on upper northERZ of Mauna Loa...

Pohaku Hanalei cinder-spatter cone (upper left) is located about 3.2 km (2 mi) NE from the north edge of the caldera rim. Eruption rates were as high as 2.9 million m3 per hour during the first 6 hours of the eruption, then diminished to about 0.5 million m3 per hour for the next 12 days. Sizable pahoehoe flows formed only during the first day of the eruption and within a

...
Castle Lake formed as a result of the Mount St. Helens' May 18, 198...
March 15, 1984

Castle Lake formed as a result of the Mount St. Helens' May 18, 198...

The May 18, 1980 debris avalanche from Mount St. Helens covered over 24 square miles (62 square kilometers) of the upper Toutle River valley and blocked tributaries of the North Fork Toutle River. New lakes such as Castle Lake (pictured here) and Coldwater Lake were created.

Debris avalanche deposit with hummocky terrain resulting from the M...
January 13, 1984

Debris avalanche deposit with hummocky terrain resulting from the M...

Debris avalanche deposit with hummocky terrain resulting from the May 18, 1980 eruption of Mount St. Helens. View to the east toward Coldwater Lake.

Red hot lava erupts vertically in the air from a cone of black, hardened lava
September 6, 1983

Low fountain of lava from Pu'u 'O'o, Kilauea Volcano, 1983

Low fountain, approximately 50 meters high, from Pu'u 'O'o on Hawai'i Island's Kilauea Volcano (viewed from the north). Lava issuing from the breach in the northeast rim of the crater produced an 'a'a flow that extended more than 4 kilometers. Eruption episode 8.

Red hot lava fountaining 100 meters into the air from a cone of hardened, black lava
September 6, 1983

100-meter lava fountain, Kilauea Volcano, 1983

Pu'u 'O'o fountain approximately 100 meters high during eruption episode 8 on Hawai'i Island's Kilauea Volcano. Dark clots of spatter land near the base of the fountain, contributing to the growth of the cone. Less dense cinder, visible in the upper right, is carried downwind of the cone.

egg-shaped ball of red-hot lava with a blackened crust sitting on a bed of grass
July 23, 1983

Lava ball, Kilauea Volcano, 1983

Accretionary lava ball comes to rest on the grass after rolling off the top of an 'a'a flow in Royal Gardens subdivision on Hawai'i Island's Kilauea Volcano. Accretionary lava balls form as viscous lava is molded around a core of already-soldified lava.

Flat-topped cinder cone with red-hot lava splattering out of the top and cascading down the sides.
June 29, 1983

Pu'u 'O'o cinder-and-spatter cone, Kilauea Volcano, 1983

View at dusk of the young Pu'u 'O'o cinder-and-spatter cone, with fountain 40 meters high, on Hawai'i Island's Kilauea Volcano (episode 5).