Indonesia has shut down an airport and has evacuated hundreds of people near Ruang volcano.
The dwarf planets in question, Eris and Makemake, are both found in the Kuiper Belt past Neptune's orbit and are far from the Sun's warmth, similar to fellow dwarf planet Pluto.
The lava flow hit thermal-based water pipes in the region just south of the capital, disrupting the supply of hot water to more than 20,000 people.
Authorities had evacuated the nearly 4,000 inhabitants of the fishing town of Grindavik last month over fears of eruption.
A 4.2 magnitude earthquake struck the area early on Wednesday, the strongest jolt in 40 years to rattle the volcanic field, known as the Campi Flegrei.
The eruption was preceded by a period of strong seismicity and "rapid uplift" of the summit.
Mount Etna has not erupted since 1992, now its lava and ash are diverting planes at the peak of Italy's holiday season.
Scientists have found the main driving force behind the generation and eruption of diamond-rich magma, which can also help find more.
Comet 12P/Pons-Brooks is a cryovolcanic comet that orbits the Sun every 71 years. After a possible volcanic eruption, it now has what seems to be two massive horns.
Keep an eye out for volcanic ash (tuf) and even some fossils that froze in the ancient marine rocks. The fossils provide a glimpse of sea life in the long book of life on Earth.
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