10 most difficult volcanos riddles

Vesuvius is the only volcano on the European mainland. The rest of them are located on European islands, the most in Iceland (around 20).

Popocatépetl is 70 km (43 mi) southeast of Mexico City, from where it can be seen regularly, depending on atmospheric conditions. Until recently, the volcano was one of three tall peaks in Mexico to contain glaciers. It is linked to the Iztaccihuatl volcano to the north by the high saddle known as the Paso de Cortés.

In Antarctica we can find the Erebus high volcano at nearly 4 km, the Don Juan pond with a salinity of 44.2%, and the desert of the McMurdo Valleys. Lake Vostok with an oxygen content 5 times more than the average, however, is hidden under a 4 km layer of glacier.

According to the Volcanic Explosivity Index, the strongest types of volcanic eruptions are Plinian/Ultra-Plinian. Some of the notable examples in that category include Lake Toba, Tambora and Krakatoa.

Mount Apo is the largest and the tallest solfataric mountain on the island of Mindanao and in all of the Philippines. The mountain has an elevation of 9,692. Six indigenous groups of people including Bagobo, Ubos, and Tagacaol live around the regions of Mount Apo and consider the mountain a sacred place and also a place for worship rituals.

Parícutin is a cinder cone volcano located in the Mexican state of Michoacán, near the city of Uruapan and about 322 kilometers (200 mi) west of Mexico City. The volcano surged suddenly from the cornfield of local farmer Dionisio Pulido in 1943, attracting both popular and scientific attention.

Mount Teide is a volcano on Tenerife in the Canary Islands, Spain. Its 3,718-metre (12,198 ft) summit is the highest point in Spain and the highest point above sea level in the islands of the Atlantic.

On 18 July 1995, the previously dormant Soufrière Hills volcano, in the southern part of the island, became active. Eruptions destroyed Montserrat's Georgian era capital city of Plymouth. Between 1995 and 2000, two-thirds of the island's population was forced to flee, primarily to the United Kingdom, leaving fewer than 1,200 people on the island as of 1997 (rising to nearly 5,000 by 2016)

Ol Doinyo Lengai is an active volcano located in Tanzania. It uniquely produces natrocarbonatite lava. Due to this unusual composition, the lava is erupted at relatively low temperatures (approx. 500-600 °C). This temperature is so low that the molten lava appears black in sunlight, rather than having the red glow common to most lavas.

The largest island in a lake on an island is Pulau Samosir in Danau Toba on Sumatra. Samosir in Lake Toba, Indonesia – 630 km2 (240 sq mi), was originally formed as a peninsula; its current island status, however, is only through its deliberate separation from the mainland by a canal.