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Daily Current Affairs – 2020

Topic: For Prelims and Mains

Taal Volcano

Why in News? The Taal Volcano erupted in Philippines recently.

 

Key points

  • Taal is the Philippines’ second most active volcano.
  • it is “very small but a dangerous volcano
  • The active volcano is at the centre of the 230 sq km Lake Taal, formed by prehistoric eruptions(a lake formed in the caldera of an earlier massive eruption)
  • Volcano Island alone has 47 craters and 4 maars – volcanic craters that form when hot magma comes into contact with shallow groundwater, producing a violent steam explosion. Other vents and eruption points are underneath Lake Taal.
  • Taal is a “complex volcano“, which means it doesn’t have one vent or cone but several eruption points that have changed over time
  • Taal has erupted in different ways more than 30 times in the past 500 years – most recently in 1977.
  • A 1911 eruption killed about 1,500 people. A 1974 eruption lasted several months
  • Taal volcano is a baby volcano sitting within a much bigger caldera volcano
  • Earthquakes and volcanic activity are not uncommon in the Philippines, which lies along the Ring of Fire – a zone of major seismic activity, which has one of the world’s most active fault lines.

Volcanic alert levels

  1. Quiet
  2. Some disturbance but no eruption soon
  3. Low to moderate seismicity – could eventually lead to eruption
  4. Relative high unresteruption possible within days or weeks, or it could die down
  5. Intense unrest – hazardous eruption possible within days
  6. Hazardous eruption – lava flowing -danger to nearby communities.

Facts for Prelims

 Nag River

The Bombay High Court has recently said that Industrialization has reduced Nag River to a cursed lady.

  • The Nag River is a river flowing through the city of Nagpur in Maharashtra, India.
  • It is known for providing the etymology for the name Nagpur.
  • Forming a part of the Kanhan-Pench river system, the Nag River originates in Lava hills near wadi.

 

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