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Lava Flow Front Remains Narrow; Continues Slowly Advancing

October 9, 2014

The June 27th lava flow remains active, and continues to slowly advance towards the northeast along the forest boundary. The flow front remains narrow, about 100 m (yards) wide, and was 1.4 km (0.9 miles) from Apaʻa St. and 2.5 km (1.6 miles) from Pāhoa Village Road (as measured along a straight line). (USGS)

The following photos, video and maps were released by the Hawaiian Volcano Observatory (USGS) (Dated October 8, 2014) . Note: these photos and video were not taken in areas currently accessible to the public. (You can visit the official website of Hawai’i Volcanoes National Park for current information on the areas of Kilauea that are open to public). Click here to see photos from previous post.

A normal photograph compared with a thermal image of the flow front. The white box shows the approximate extent of the thermal image. Breakouts (white and yellow areas in thermal image) were active at the leading edge of the flow, and were also scattered behind the flow front. (USGS)

A view into one of the skylights of the lava tube supplying lava to the June 27th lava flow. (USGS)

A look into the southern portion of Puʻu ʻŌʻō Crater. A small lava pond (roughly 10 meters, or yards, wide) was active in the southern pit. The pond surface was fluctuating as spattering was active on the pond margin. (USGS)

CLICK PHOTO TO WATCH VIDEO: This Quicktime movie provides a quick aerial overview of activity at the flow front. At the end of the movie there is a view of the lava stream in one of the skylights on the lava tube supplying lava to the flow front. (USGS)

A wider view of the flow front, with Kaohe Homesteads at the left side of the photograph. Puʻu ʻŌʻō can be seen on the horizon in the upper right. (USGS)

A closer view of the flow front moving along the forest boundary. The flow front had nearly entered a clearing in the thick forest. (USGS)

This map uses a satellite image acquired in March 2014 (provided by Digital Globe) as a base to show the area around the front of the June 27th lava flow. The area of the flow on October 6, 2014, at 12:15 AM is shown in pink, while widening and advancement of the flow as mapped on October 8 at 10:20 PM is shown in red. The flow front advanced about 200 m (220 yd) since our October 6, 2014, overflight. This puts the flow front about 1.7 km (1.1 mi) upslope from Apaʻa Street, as measured along the path of steepest-descent. The solid blue line with the arrowhead shows the projected path of the flow over the next 10 days (to October 16), based on the steepest-descent path and the average advance rate of 120 m/day (130 yd/day) achieved since September 29. The amount of lava erupted from the June 27th vent, and the advance rate of the resulting lava flow, have been variable. The flow could speed up or slow down; the flow front could stall again, and a new active flow front could start again farther upslope; or the flow could stop altogether. Thus, this projection is subject to change. The dotted blue line shows the steepest-descent path, calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/), that the flow is projected to follow. Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth’s surface. DEMs, however, are not perfect, so the dotted blue line indicates an approximate flow path direction. (USGS)

This large-scale map shows the distal part of the June 27th flow in relation to nearby Puna communities. The area of the flow on October 6 at 12:15 PM is shown in pink, while advancement of the flow as mapped on October 8 at 10:20 AM is shown in red. Breakouts were mainly scattered across the leading edge of the flow. A few other breakouts were active on the surface within the crack system. The black dots mark the flow front on specific dates. The blue lines show steepest-descent paths calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth’s surface. DEMs, however, are not perfect, so the blue lines on this map indicate approximate flow path directions. (USGS)

This small-scale map shows the June 27th lava flow in Kīlauea’s East Rift Zone in relation to lower Puna. The area of the flow on October 6, 2014, at 12:15 PM is shown in pink, while advancement of the flow as mapped on October 8 at 10:20 AM is shown in red. All older Puʻu ʻŌʻō lava flows (1983–2014) are shown in gray; the yellow line marks the lava tube. The blue lines show steepest-descent paths calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth’s surface. DEMs, however, are not perfect, so the blue lines on this map indicate approximate flow path directions. (USGS)

 

 

One Comment leave one →
  1. marycheshier permalink
    October 9, 2014 8:21 am

    So sad! Thanks for the update

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