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(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

A lava lake was present within the Halema`uma`u Overlook vent over the past week, resulting in night-time glow that was visible from the Jaggar Museum overlook. The lake, which is about 100 m (330 ft) below the floor of Halema`uma`u and visible by Webcam, rose and fell slightly during the week in response to back-to-back deflation-inflation cycles.

Eruptive activity on Kilauea’s east rift zone was restricted to surface flows about 4.1 km (2.5 miles) east-southeast of Pu`u `O`o. These flows travel through a lava tube that is fed by the September 21 fissure on the upper east flank of the Pu`u `O`o cone.

Two earthquakes beneath Hawai`i Island were reported felt this past week. A magnitude-2.6 earthquake occurred at 4:34 p.m. HST on Saturday, November 5, 2011, and was located 9 km (6 mi) east of Waiki`i at a depth of 21 km (13 mi). A magnitude-3.9 earthquake occurred at 1:46 a.m. Monday, November 7, and was located 6 km (4 mi) east of `Opihikao at a depth of 45 km (28 mi).
Visit the HVO Web site (http://hvo.wr.usgs.gov) for detailed Kilauea and Mauna Loa activity updates, recent volcano photos, recent earthquakes, and more; call (808) 967-8862 for a Kilauea summary; email questions to askHVO@usgs.gov

Map showing the extent of lava flows erupted during Kīlauea’s ongoing east rift zone eruption and labeled with the years in which they were active. Episodes 1–48b (1983–1986) is shown in dark gray; Episodes 48c–49 (1986–1992) is pale yellow; Episodes 50–53 and 55 (1992–2007) is tan; Episode 54 (1997) is yellow; Episode 58 (2007–2011) is pale orange; the episode 59 Kamoamoa eruption (March 2011) is at left in light reddish orange; and the episode 60 Pu‘u ‘Ō‘ō overflows and flank breakout (Mar–August 2011) is orange. The currently active flow (episode 61) is shown as the two shades of red—pink is the extent of the flow from September 21 to November 3, and bright red marks flow expansion from November 3 to November 10. The contour interval on Pu‘u ‘Ō‘ō is 5 m.