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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, or Peace Day flow) is shown as the two shades of red—pink is the extent of the flow from September 21, 2011, to January 12, 2012, and bright red marks flow expansion from January 12 to January 26. The active lava tube is delineated by the yellow line within the active flow field. The contour interval on Pu‘u ‘Ō‘ō is 5 m.