Parent Interventions: As a Studious Girl Destroyed Her Mobile Phone  |  Teacher Insights: Know about how to choose the best MPPSC coaching institute  |  National Edu News: Swinburne University of Technology & IIT H launch the joint doctoral program  |  Policy Indications: India & Japan collaborations for innovations on Hydrogen based technologies  |  National Edu News: Education Minister addresses at the Annual Convocation of IIM Rohtak  |  Education Information: UPSC postpones tests and Interviews of some examinations  |  National Edu News: Piyush Goyal launches the Startup India Seed Fund Scheme  |  Teacher Insights: Are you Proficient in English?  |  National Edu News: National climate vulnerability assessment sees 8 states as highly vulnerable  |  National Edu News: Education minister e-launches long-lasting hygiene product DuroKea Series  |  National Edu News: Punjab’s new nutrient rich crop varieties can satisfy India's nutritional needs   |  Guest Column: Delicious Dhabas  |  International Edu News: 2D Perovskites for Solar Cells and LEDS  |  International Edu News: AI Model for Predicting Tsunami  |  International Edu News: Wearable Sweat Sensors on a Bandage  |  
March 07, 2021 Sunday 05:05:05 PM IST

The Mystery of the Flying Volcanic Ash Particles Revealed

Science Innovations

When the Eyjafjallajokull volcano erupted in Iceland in April 2010, air traffic was interrupted for six days and then disrupted until May. Interestingly, particles of the volcano were discovered in UK which were much larger than expected. According to Eduardo Rossi, a researcher at the Department of Earth Sciences of University of Geneva (UNIGE) said that fragments thrown out during a volcanic explosion range from a few microns to more than two metres.  The larger particles are faster and closer to the volcano.

The scientists analysed the volcanic ash particles from Sakurajima volcano of Japan that erupts 2-3 times daily for more than 50 years. The scientists used adhesive paper to collect the ash before it hit the ground. IN Ehyjafjallajokull eruption, micrometric particles group  into clusters. On hitting the ground it gets destroyed. 

In Japan, the scientists used high speed camera to observe the sedimentation of the ash in real-time and saw the clusters. It is formed by large particle of 100-800 microns-the core-which is covered by many small particles less than 60 microns. This external layer of small particles can act like a parachute over the core, delaying its sedimentation. This is called the rafting effect. Scientists were thus able to solve the mystery of how large particles of volcanic ash particles of Eyjafjallajokull was discovered in UK which was attributed to the rafting effect.