Images

USGS topographer Don Winstead working with a level in Hawaii.

USGS topographer Russ Curtis using a Wild N3 level.

Lava falls pour into 'Alae Crater at 11 p.m., HST, on August 5, 1969, supplied by a high lava fountain at Mauna Ulu, 600 m (2,000 feet) away. The falls, more than 100 m (330 ft) high and 300 m (1,000 ft) wide, had nearly filled the crater by the time the fountains stopped at 5:45 a.m., August 6.

The February 1969 rift eruption near Nāpau Crater was a brief but dynamic precursor to the long-lived Maunaulu eruption that began in May of that year. This week-long event featured lava fountaining from multiple fissures along a 2.5-mile stretch of Kīlauea’s upper East Rift Zone.

Blasting craters for a new section of the Cinder Lakes outside Flagstaff, Ariz.(July 1968). USGS Astrogeology constructed a mockup of a section of the moon's Sea of Tranquillity in a cinder field to aid with training and time-and-motion studies.

Yutaka Hamamoto working on a Wild A-7 Stereoplanigraph.

Repeat oblique photographs of Gulkana glaciers in Alaska.  1967, Unknown USGS photographer. 2016, L. Sass, USGS.

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, (A) looking upstream from right bank, April 2, 1967 (not known if pilings visible at base of bridge pier are result of channel-bed incision).
USGS SIR 2009–5174

Repeat oblique photographs of Wolverine glacier in Alaska.  1966 image by unknown USGS photographer; 2015 image by L. Sass, USGS.

Topographer Jim Tennant making measurements with a Wild T-2 theodolite on Mount Trumball in Arizona.

Jay Prendergast adjusts the lens on a Robertson 48-inch, 4.5 ton camera. Installed in 1959, the camera was used for precise scale transformation of mapping separates and composites.

Working with a small copy camera.

Calvin Hazlewood works with a 48-inch Robertson copy camera.

Riparian vegetation has increased to the extent of blocking the downstream view. The channel appears to have shifted to the right, and the terrace is now occupied by cottonwood, black willow, and tamarisk. (Raymond M. Turner).

U.S. Geological Survey streamflow-gaging station 08098290 Brazos River near Highbank, Texas, looking upstream from FM 413 bridge, March 31, 1964.

SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08098290 Brazos River near Highbank, Texas, looking downstream from FM 413 bridge, March 31, 1964.

SIR 2009–5174

Although large streamgage structures are no longer necessary, the USGS still uses some of them to contain modern streamgage equipment.

USGS topographer Yukio Yamamoto in Littlefield, Texas with a theodolite and an Electrotape distance measuring unit.

The 1961 fissure eruption near Nāpau Crater was a short-lived but notable event on Kīlauea’s East Rift Zone, occurring in late September. Over two days, lava erupted from vents along a 13-mile stretch, producing 13 small flows and lava fountains that reached heights of up to 400 feet, with the largest flows occurring near Pāhoa.

The July 1961 eruption at Halemaʻumaʻu was the third summit eruption of that year, continuing the pattern of vigorous volcanic activity at Kīlauea. This event featured sustained lava fountaining and further infilling of the crater, building upon the changes initiated by the February and March eruptions.

The March 1961 eruption at Halemaʻumaʻu was the second of three summit eruptions at Kīlauea that year, marked by renewed lava activity within the northeast collapse pit formed in February. This phase featured vigorous lava fountaining, crater floor uplift, and the gradual infilling of the pit, reflecting continued magma supply and dynamic summit processes.