Kīlauea’s summit lava lake in Halemaʻumaʻu Crater. A persistent spatter source is active on the lake margin and lava pond in Puʻu ʻŌʻō crater, which was undergoing “gas pistoning”. Gas pistoning is the cyclic rise and fall of the lava surface, driven by the buildup and release of gas in the lava pond. This sequence […]
