October 15, 2021—Kīlauea summit eruption thermal maps

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A helicopter overflight on October 15, 2021, at approximately 7:30 a.m. HST allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea.

Color map of lava lake temperature

A helicopter overflight on October 15, 2021, at approximately 7:30 a.m. HST allowed for aerial visual and thermal imagery to be collected of Halema‘uma‘u crater at the summit of Kīlauea. The scale of the thermal map ranges from blue to red, with blue colors indicative of cooler temperatures and red colors indicative of warmer temperatures. The dimensions of the new lava lake have not changed drastically since the previous overflight on October 8, 2021—1020 m (0.6 mile) along the east-west axis and 725 m (0.5 mile) along the north-south axis. The estimated area of the lake is about 55 hectares (137 acres). USGS map by M. Patrick.

(Public domain.)

 

Color map of lava lake temperature

This detailed thermal map of the Halema‘uma‘u lava lake is a zoomed-in version of the broader map above, constructed from imagery collected during a helicopter overflight on October 15, 2021, at approximately 7:30 a.m. HST. The scale of the thermal map ranges from blue to red, with blue colors indicative of cooler temperatures and red colors indicative of warmer temperatures. The only remaining active eruptive vent at this time is the west vent; several hotspots in the southern part of the lava lake correspond with short lava cascades between the higher western half and lower eastern half of the lake. USGS map by M. Patrick.

(Public domain.)

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