2010 eruptions of Mount Merapi possible widening of the exclusion zone was considered to have the potential to affect the availability of departure options. It was noted that there had been a deterioration in air quality in Yogyakarta from ash falling on the city. It was cautioned that volcanic ash could cause breathing difficulties, particularly for people with chronic respiratory ailments such as asthma, emphysema, or bronchitis. The Indonesian Social Welfare Minister, Salim Segaf Al-Jufri announced on 19 November that the government planned to end the emergency response period for the Mount Merapi eruption disaster on 24 November. "We will maintain the emergency response period
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