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Phreatic activity leading up to the first explosive event captured at the main crater of Taal Volcano. Video taken from the installed IP camera of PHIVOLCS monitoring Taal Volcano. The volcano erupted on the afternoon of January 12, 2020, 43 years after its previous eruption in 1977. [6]
A well-known equality featuring the equal sign. The equals sign ( British English) or equal sign ( American English ), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. [1] In an equation, it is placed between two expressions that have the same value, or for which one ...
Cultural-historical activity theory. Cultural-historical activity theory ( CHAT) [1] is a theoretical framework [2] which helps to understand and analyse the relationship between the human mind (what people think and feel) and activity (what people do). [3] [4] [5] It traces its origins to the founders [6] of the cultural-historical school of ...
A hunter pictured standing over a rhino in the colonial era. Rhinoceros poaching in southern Africa is the illegal act of slaughtering rhinoceros in the southern African countries of Namibia, Botswana, Zimbabwe and South Africa, where most of Africa's rhinos live. [1] The most common reason for rhino poaching is to meet the high demand for ...
List of earthquakes in Peru. Earthquakes in Peru are common occurrences as the country is located in a seismic zone. The interface between the Nazca and South American tectonic plates is located near the Peruvian coast. The South American Plate is moving over the Nazca Plate at a rate of 77 mm (3.0 in) per year. [1] This earthquakes occur as ...
Paraná and Etendeka traps, Brazil, Namibia and Angola form 128 to 138 million years ago. 132 million years ago, a possible supervolcanic eruption occurred, ejecting 8,600 cubic kilometers (2,063 cu mi). [90] Formation of the Karoo-Ferrar flood basalts begins 183 million years ago.
Solar activity, driven by both the solar cycle and transient aperiodic processes, governs the environment of interplanetary space by creating space weather and impacting space- and ground-based technologies as well as the Earth's atmosphere and also possibly climate fluctuations on scales of centuries and longer.
January 3+: Anonymous got involved during the Tunisian Revolution and engaged in DDoS attacks on key Tunisian websites—including the president, prime minister, ministry of industry, ministry of foreign affairs, and the stock exchange—taking down at least 8 websites and defacing several others.