Descriere:
epa06825199 A handout photo made available by the United States Geological Survey (USGS) on 20 June 2018 shows an Hawaiian Volcano Observatory (HVO) geologist using a thermal camera to measure the temperature (about 93 degrees Celsius) of a ground crack near Kilauea volcano's fissure 9, Hawaii, USA, 18 June 2018. In the lower East Rift Zone, a field geologist's daily duties can include monitoring ground cracks for temperature and gas changes, measuring heights of lava fountains and cinder cones, and tracking lava's speed at various locations. Geologists also monitor for channel overflows and collect tephra samples for geochemical analysis. The information is used to understand more about how the fissure complex behaves and informs the USGS' assessment of hazards. EPA/USGS HANDOUT HANDOUT EDITORIAL USE ONLY/NO SALES
Dimensiune:
4032 x 3024 px
Introdus:
2018-06-20 20:34:18