Images

Map view. Colored shaded-relief bathymetry map of Offshore of Half Moon Bay map area, generated from multibeam echosounder data. Colors show depth: reds and oranges indicate shallower areas; light blues, deeper areas. Illumination azimuth is 300°, from 45° above horizon.

Map showing the distribution of physiographic zones within the Buzzards Bay study area. The physiographic zone classification is adapted from Kelley and others (1998), and the zones are delineated on the basis of sea-floor morphology and the dominant texture of surficial material.

A flow tripod (taller, right) and sonar tripod (smaller, left) at the dock before being loaded onto a ship and taken to a site off Fire Island for deployment.

Flyer for the Mount St. Helens Teacher Workshop. Held June 25-27, 2014, it was a workshop for middle school teachers.

LaharZ model (left) of the possible lahar hazards from the Carbon and Puyallup River drainages from Mount Rainier. The town of Orting, Washington (photograph) sits in the lahar hazard zone.

Map showing the lava flows that have erupted on Mauna Loa Volcano from 1843-1984.

Acoustic backscatter data show the intensity of an acoustic pulse off the seafloor and back to a ship. Brighter tones indicate a strong intensity (possibly harder seafloor?), while darker ones indicate a weaker intensity (possibly softer seafloor?).

Example of a high-resolution seismic-reflection profile collected by the USGS offshore of Point Sal. The profile shows a cross-section of the earth's crust down to about 240 meters. The dashed red lines show the Hosgri Fault Zone, part of a strike-slip fault system that extends for about 400 kilometers along the California coast from Point Arguello to Bolinas.

Pollution performance curves for different ceramic and non-ceramic insulators. The pink shaded area represents an Ave. ESDD/NSDD 0.02/10.7 - 0.04/19.1 mg/cm2; yellow represents an Ave. ESDD/NSDD 0.1/60 - 0.3/106 mg/cm2; purple an Ave. ESDD/NSDD 0.3/113 - 0.6/218 mg/cm2

This large-scale map shows the distal part of Kīlauea's active East Rift Zone lava flow in relation to nearby Puna communities. The area of the flow on December 22 at 3:00 PM is shown in pink, while widening and advancement of the flow as mapped on December 30 at 2:30 PM is shown in red.

The leading part of the flow consisted of several small, active lobes this afternoon. The front of the lobe that crossed the firebreak was stalled, though breakouts were active about 50 m (55 yd) upslope. Another lobe (area of most visible smoke in center) was about 300 m (330 yd) upslope of the tip and 150 m (165 yd) upslope of the firebreak.

This large-scale map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of Kīlauea's active East Rift Zone lava flow. The area of the flow on December 22 at 3:00 PM is shown in pink, while widening and advancement of the flow as mapped on December 30 at 2:30 PM is shown in red.

Close view of incandescence in spatter cone within a pit at the northeast edge of Pu‘u ‘Ō‘ō's crater (the smaller pit visible to the right side in the adjacent photograph). Note small flows that cover the floor of this small crater.

A clear view today of Pu‘u ‘Ō‘ō's summit revealed no significant change during the past week. The cross-sectional area of the active lava stream in the tube on the flank of Pu‘u ‘Ō‘ō was the same as measured on December 22, suggesting no change in lava discharge from the vent.

Kīlauea's East Rift Zone lava flow remains active upslope from the Pahoa Marketplace area, visible at lower right. The leading edge stalled on December 22, but breakouts just upslope widened the flow field and then overtook the flow front during the past few days. The new leading edge advanced the flow front about 150 m (165 yd) since December 27.

This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to lower Puna. The area of the flow on December 22 at 3:00 PM is shown in pink, while widening and advancement of the flow as mapped on December 30 at 2:30 PM is shown in red.

This satellite image was captured on Thursday, December 25, by the Advanced Land Imager instrument onboard NASA's Earth Observing 1 satellite. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see. Bright red pixels depict areas of very high temperatures and show active lava. White areas are clouds.

This satellite image was captured on Thursday, December 25, by the Advanced Land Imager instrument onboard NASA's Earth Observing 1 satellite. Although this is a false-color image, the color map has been chosen to mimic what the human eye would expect to see. Bright red pixels depict areas of very high temperatures and show active lava. White areas are clouds.

This small-scale map shows Kīlauea's active East Rift Zone lava flow in relation to lower Puna. The area of the flow on December 19 at 8:30 AM is shown in pink, while widening and advancement of the flow as mapped on December 22 at 3:00 PM is shown in red.

A breakout from the lava tube has also been active on the upper part of the flow field near Pu‘u ‘Ō‘ō since December 5. The smoke is from a narrow finger of lava burning lichen on an older Pu‘u ‘Ō‘ō lava flow. Pu‘u ‘Ō‘ō is at upper right. The view is to the south-southwest.

This map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of Kīlauea's active East Rift Zone lava flow. The area of the flow on December 19 at 8:30 AM is shown in pink, while advancement of the flow as mapped on December 22 at 3:00 PM is shown in red.