Images

Kīlauea Volcano's summit lava lake activity over the past few days has been typical, with intermittent sites of spattering and migration of the crust from north to south (top to bottom of image). This view of the lava lake was captured on the evening of Saturday, November 18.

This video shows typical spattering in the summit lava lake in Halema‘uma‘u Crater. Spattering is driven by the bursting of large gas bubbles. The surface crust tends to flow into the spattering sites, where the crust is shredded and sinks.

Spattering is common in the summit lava lake, normally at one or more sites along the lake margin. A spattering area along the northeast lake margin on Friday, November 17, is shown here. The surface crust tends to flow into the spattering area, where it sinks.

The surface crust on the summit lava lake has many different textures, and these textures can be used to identify where portions of a crustal plate originated. For instance, in this November 20 photo, the long narrow band of striated crust that cuts across the image diagonally originated from the spreading zone in the upper left area of the photo.

Over the past week, the episode 61g Kamokuna lava delta has been partially resurfaced by viscous, spiny pāhoehoe flows (darker in color). Geologists at the ocean entry today (November 17) did not see an active ocean entry, but lava has intermittently entered the ocean over the past few weeks.

Two nene fly above Pu‘uhuluhulu, a forested Mauna Kea cinder cone surrounded by younger Mauna Loa lava flows (foreground), in the Humu‘ula Saddle on the Island of Hawai‘i. This cone is just one of the outstanding volcanic features that can be seen along Route 200, the Daniel K. Inouye Highway. USGS photo by J. Kauahikaua.

USGS volcanologist Jessica Ball leads a discussion during a FEMA Volcanic Crisis Awareness course held in Chester, CA in November 2017.

Snapshot from video camera that sits atop the Dream Inn looks eastward over Main Beach and boardwalk in Santa Cruz, California.

Still-image from video camera atop the Dream Inn looks eastward over Main Beach and boardwalk in Santa Cruz, CA.

A series of images from various sources of shaded-relief topography show the progression of the Mud Creek landslide area, from 2010 through October 12, 2017.

Sources:

Hualālai (center) and Mauna Loa (left background), two of the four active volcanoes on the Island of Hawai‘i, are ranked as "high threat" and "very high threat" volcanoes, respectively. Kīholo Bay (left foreground) is flanked on the north (left) by a lava flow erupted from Mauna Loa in 1859 and on the south by the Ka‘ūPULEHU flow erupted from Hualālai around 1800.

This HiRISE image cutout shows Recurring Slope Lineae in Tivat crater on Mars in enhanced color. The narrow, dark flows descend downhill (towards the upper left). Analysis shows that the flows all end at approximately the same slope, which is similar to the angle of repose for sand.

Seafloor photograph of a spider crab, sediment, rocks, taken by the Woods Hole Coastal and Marine Science Center SeaBOSS during a deployment off the R/V Connecticut in Long Island Sound

Long Island Sound Survey mapping team.  This project is a collaboration of several agencies and institutions including Univ of Connecticut, Univ of New Haven, Connecticut Department of Energy and Environmental Protection, NOAA, LDEO, USGS

Image of the SeaBOSS and USGS personnel on the fantail of the R/V Connecticut in Long Island Sound

SeaBOSS on the fantail of the R/V Connecticut on Long Island Sound at sunrise

SeaBOSS on the fantail of R/V Connecticut on Long Island Sound

USGS personnel adjust equipment on the SeaBOSS on the fantail of the R/V Connecticut on Long Island Sound

Storm overwash on Surf Drive Beach, Falmouth, MA  

Storm overwash, Surf Drive Beach, Falmouth, MA

Overwash from Surf Drive Beach, Falmouth, MA