2010 eruptions of Mount Merapi continued to push its way up into the volcano's lava dome. A pyroclastic river flowed from Merapi again on 30 October 2010 at 00:35. A pyroclastic flow headed toward Gendol River, Kuning River, Krasak River, and Boyong River. This was then followed by an explosion from Merapi resulting in a two-kilometre vertical high fire ball rising from the top of the mountain . This eruption caused raining sand to fall on areas to a radius of up to from the volcano. Amongst activities from government and NGO's the Indonesian Red Cross and Red Crescent (PMI) had by this time fielded
Earthquake noted, which could be explained by a cyclical pattern of periods of intense tectonic activity, interspersed with longer periods of low-intensity. However, accurate recordings of earthquakes only began in the early 1900s, so it is too early to categorically state that this is the case. Most of the world's earthquakes (90%, and 81% of the largest) take place in the 40,000 km long, horseshoe-shaped zone called the circum-Pacific seismic belt, known as the Pacific Ring of Fire, which for the most part bounds the Pacific Plate. Massive earthquakes tend to occur along other plate boundaries, too, such as along the