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Irma's gales swept across South Florida in this image taken near Naples, Florida.
Shortly after Hurricane Harvey, Hurricane Irma headed for the U.S., here over the Virgin Islands.
Marine researchers sample devil weed (S. horneri) off Santa Catalina Island, California.
The invasive seaweed called devil weed dominates large swaths of reef off Santa Catalina Island.
Sargassum horneri being removed by hand and collected in bags for disposal on land.
Sargassum horneri is fed into the hose of a vacuum device and transported to the surface.
At the surface, algae is inspected for by-catch before being placed in trash bags for disposal.
A research plot after the removal of devil weed using a vacuum device.
LIGO is an example of risky but potentially revolutionary science funded by NSF.
Field operations manager Ryan Bierma makes last adjustments to station C19K as a blizzard rolls in.
Map of EarthScope Alaska Transportable Array stations (red symbols). Circles are new stations.
A broadband seismometer is at each station, with buried cables to connect it to the main power hut.
Placing a seismometer in bedrock is preferred but not always possible in the array's spacing.
On Earth Science Week, NSF's EarthScope Transportable Array celebrated its final frontier: Alaska.
The Transportable Array field crew and helicopter pilots celebrate a successful installation.
Jeffrey C. Hall, Michael Rosbash and Michael W. Young.
An NSF Moorea Coral Reef LTER site research boat is moored on an outer reef; background is Tahiti.
Researchers, here Dan Sternberg, assist with the deployment of coral settlement tiles on the reefs.
Unglazed terracotta tiles are bolted to the reef, and baby corals settle onto the tiles.
Tiles like these were attached deeper on the outer reef and shallower on the back reef.
NSF Moorea LTER researcher Vincent Moriarty helps with placing settlement tiles on the back reef.
To test for El Niņo effects on coral recruitment, the scientists deployed 250 settlement tiles.
NSF Director France A. Córdova.
Arecibo staff after the storm.
Aerial view of the Virgo site, including the two perpendicular arms of its interferometer.
LIGO operates two detector sites. The Livingston, Louisiana, site is pictured here.
The LIGO detector in Hanford, Washington.