Images

Schematic cross-section of the accretionary wedge along the Cascadia subduction zone. Modified from Moore and others, 2007.

Index map of U.S. Cascadia margin showing where data have been collected since 2018 as part of the Subduction Zone Marine Geohazards Project. Details of each survey effort are provided on the Cascadia Subduction Zone Marine Geohazards project web site.

Bathymetric map of offshore Oregon with Stonewall, Heceta, and Siltcoos Banks labeled.

Bathymetric map of offshore Washington reveals seafloor features and submarine canyons.

Topo-bathymetric map of the Cascadia subduction zone. Cascadia megathrust fault (white line); approximate shelf break along 200-m isobath (yellow line); MTJ, Mendocino triple junction.

Black streak on caldera wall (center) is about 50 m (yards) long, and white steam plume (lower right) rises from northwestern part of Halema‘uma‘u. Photo from Volcano House Hotel on July 4, 2018. The configuration of this area changed considerably after the photo was taken, as collapse continued into early August. USGS photo.

The KWcam webcam at Kīlauea's summit captured a rainbow over the water lake in Halema‘uma‘u this afternoon, as light mist moved across the caldera.

Fisseha Mengistu, USGS hydrologic technician, uses a device that lowers a water sampler into the creek below to collect samples used for water quality testing. Experts will be able to use this data to track how Tropical Storm Isaias impacted water quality in the area. This work was done on Rock Creek in Washington, D.C.

Scientists use a MultiGAS instrument (gray, hard-shell case) to measure gas compositions from the East Lake hot spring in the Newberry caldera. The photo was taken on August 3, 2020 just after sunrise. The vapor above the hot spring and lake is typical for cool mornings and is not visible later in the day.

USGS coastal change experts predict that storm waves kicked up by the Category 1 hurricane are likely to cause some erosion at the base of the dunes along about 11 percent of coastal beaches between Florida and Virginia.

This timelapse video at Kīlauea's summit covers approximately 30 minutes and shows the dynamic nature of the water lake in Halema‘uma‘u crater. Steam from the hot water surface is constantly shifting in the winds, while the migrating color boundaries on the water surface appear to show circulation in the lake. USGS video by M. Patrick.

Plot showing rise of Kīlauea's summit crater lake over the past year, during which laser rangefinder measurements of lake level were made 2–3 times per week. Photos compare the lake on August 27, 2019, when it was ~22 ft (7 m) deep, to July 7, 2020, when it was ~130 ft (40 m) deep. USGS photos.

Kīlauea's summit water lake, in Halema‘uma‘u, continues to slowly rise. Today, the lake colors were vibrant, with a zone of aquamarine water in the west end (lower right in photo). These greenish zones tend to be slightly hotter, and appear to be zones of water influx. USGS photo by M. Patrick.

Description: This is a high-resolution oblique view of the northeastern edge of the delta deposit in Jezero crater, the landing site for the Perseverance Mars rover. In the foreground, buttes of delta material stand above the crater floor. On the left and in the middle of this image, the layered rocks of the delta deposit are visible.

Image comparison of Kīlauea summit lake on August 2, 2019 and July July 21, 2020

An HVO geologist collects GPS data on the western rim of Kīlauea's summit caldera. The geologist is standing upon a thick sequence of tephra deposits formed during explosive eruptions at Kīlauea's summit between about 1500 CE and the early 19th century.

Comet NEOWISE is seen with the Roosevelt Arch in the foreground at the north Entrance of Yellowstone National Park.  The town of Gardiner, Montana, is in the background.

Another view of the Fissure 8 channel, looking upstream. On the right, a lower ledge along the channel wall represents the level of lava in the channel during the later stages of the flow. USGS photo by M. Patrick.

View of the recently cleared Boiling Pots on the Wailuku River in Hilo. The pots, each about 15 m (50 ft) in diameter, are eroded into a 10,000 year old Mauna Loa lava flow. When the water is low, the river does not flow over some of the pot rims but it continues to flow through them. USGS photo.

HVO geologists visited the lower East Rift Zone lava flow field this past week to make measurements and observations, to better understand and reconstruct the dynamics of the Fissure 8 lava flow. This photo shows the channel wall in the braided channel region of the flow.

Images showing the flyrock trajectory from the 24 June 2020 rockfall (see previous figure). Rock impacts at the base of the talus slope split and moved boulders, launching a 0.5 cubic meter boulder 92 m into the lower parking lot at Whitney Portal.