lave

On this day, August 21, 1959, the United States as we know it was completed with the addition of the 50th State… Hawaii. It is the only state that is completely comprised of islands…volcanic islands. Hawaii has another unique feature besides being an island state. That unique feature is that it is the only state that is naturally increasing in size. Most of us immediately think of the current eruptions of Kilauea, and that is a big part of the grown of Hawaii, but it is not the only cause of the growth.

Not every addition to the Big Island involves an eruption that puts people at risk and engulfs their communities. For decades, Kilauea has experienced continuous lava flows through a vent called Pu?u ???? in Hawaii Volcanoes National Park, incrementally adding land to the southeast portion of the island. This continuous flow has added 570 acres of land to Hawaii’s Big Island since 1983, according to the U.S. Geological Survey’s most recent update. Unfortunately, the lava has also buried over 40 square miles of rain forest, communities, and historical sites. Hawaii is an ever-changing place, and the lava doesn’t care about such things as rain forests, communities, and historical sites.

The current stories of the eruption of Kilauea has continued to shock the world, but in reality, Kilauea has been continuously erupting since 1983. Still, on May 3, 2018, the volcano erupted dramatically. The eruption occurred several hours after a magnitude-5.0 quake struck the Big Island. With the eruption came lava flows into residential subdivisions in the Puna district of the Big Island. This prompted mandatory evacuations of the Leilani Estates and Lanipuna Gardens subdivisions. Scientists have two theories about the formation of the Hawaiian Islands. Unlike most volcanoes, the Hawaiian chain sits squarely in the middle of the Pacific plate rather than on a tectonic boundary.

In 1963, J Tuzo Wilson proposed the “hotspot theory” to explain this unusual placement. Wilson proposed that the linear geography of the Hawaiian Islands is due to the movement of the Pacific plate over a stationary point of great heat from deep within the Earth. I have to wonder if that movement is exactly what is causing the current continuing flow of lava from Kilauea. I seems to me that it would be difficult for the lava flow to seal itself when the fault keeps breaking the seal. I could be totally wrong, or I could just be looking at this in a far too simplistic manner. Nevertheless, it seems logical to me. Or maybe that is exactly what Wilson was saying.

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