Images

USGS hydrologists return from measuring streamflow on the Red River in Fargo, N.D. The USGS Red River of the North at Fargo streamgage can be seen on the right in the image.

USGS hydrologist Dan Thomas shows media how the acoustic Doppler current profiler (on the right) measures streamflow on the Red River in Fargo.

This is a typical GPS monitoring station example from Hualālai Volcano.

The September Lobe monitoring station is part of the network of monitoring stations that detects and reports subtle changes in the volcanic vent area. At 2150 m (about 7100 ft) elevation, maintenance is performed during good weather to keep the station fully functional.

Surface fracture. Lushan downtown.

Surface fracture follow WE direction. Lushan downtown.

Breakouts have diminished over the past few days on the Kahauale‘a flow (heading northeast of Pu‘u ‘Ō‘ō), and the flow front has not advanced significantly since April 8. Compare today's thermal image with that from the April 8 overflight. During today's flight, there were no active breakouts at the flow front.

Building damage outside Lushan station.

Lava erupted this morning from the cone near the north rim of Pu‘u ‘Ō‘ō crater, with a small portion of the flow emptying out onto the east spillway. This new flow brings the floor of the crater slightly closer to the north crater rim.

Damage to a village house. Longmenxiang.

Surface fracture width. Lushan downtown.

Damage to a village house. Longmenxiang.

Damage to a village house. Longmenxiang.

A vigorous flow was erupted on the floor of Pu‘u ‘Ō‘ō crater starting early this morning from a cone near the north rim, but a smaller flow was also erupted from a spatter cone near the south rim around noon. This photo captures a burst of spatter from the southern cone as the small flow was erupted.

Cascades Volcano Observatory (CVO) staff in front of the CVO office building in Vancouver, Washington, May 1, 2018

Map showing locations of USGS NetQuakes recorders and epicenter of M3.2 earthquake occurring on April 3, 2013. Around the map are plots of the strongest shaking recorded at each of the NetQuakes sites associated with this earthquake. The plots are not adjusted to reflect differences in shaking among the individual sites.

The two active flows (Kahauale‘a and Peace Day) are both fed from vents high on Pu‘u ‘Ō‘ō cone. This view (looking southwest) shows Pu‘u ‘Ō‘ō crater. In the foreground, a lava pond and small spots of orange glow mark the location of the vent for the Kahauale‘a flow.

This steep spatter cone near the north rim of Pu‘u ‘Ō‘ō crater was making loud gas jetting sounds, presumably due to gas forced through the small glowing holes near the top of the cone.

Another view of the ocean entry points and discolored water at Kupapa‘u. The thermal camera today showed that water surface temperatures were up 50 degrees Celsius (122 degrees Fahrenheit) a short distance out from the entry points. Just beyond the ocean entry, the light colored areas represent active breakouts. On the pali, fume marks the path of the lava tube.

View looking northeast towards Kalapana from the ocean entry. The small white dots in the distance are houses in Kalapana Gardens subdivision.

Adrian Mann is using a piezometer to extract submarine groundwater to analyze for geochemical parameters in Indian River Bay, DE.