“Scientists have long believed tsunamis form from vertical deformation of seafloor during undersea earthquakes. However, seismograph and GPS data show such deformation from the 2004 Sumatra earthquake was too small to generate the powerful tsunami that ensued. Song’s team found horizontal forces were responsible for two-thirds of the tsunami’s height, as observed by three satellites (NASA’s Jason, the U.S. Navy’s Geosat Follow-on and the European Space Agency’s Environmental Satellite), and generated five times more energy than the earthquake’s vertical displacements. The horizontal forces also best explain the way the tsunami spread out across the Indian Ocean. The same mechanism was also found to explain the data observed from the 2005 Nias earthquake and tsunami. ”
2/3rd of 2004 Tsunami wave height caused by Horizontal Forces
Posted on January 19, 2008 / 1 Comments
Share this:
LIRNEasia’ multidisciplinary work on disruptive innovation
Today, I delivered the keynote at the 9th International Conference on multidisciplinary approaches at the University of Sri Jayewardenepura. Here is on story that I told.
Learnings on disaster risk reduction in Sinhala
මූලික වශයෙන් ආපදා අවදානම අවම කිරීමේ වගකීම භාර ගත යුතු වන්නේ රජයයි. සුනාමිය ඉදිරියේ රජය අසරණ වුවද එම භූමිකාව පවරාගත හැකි වෙනත් ආයතනයක් නැති බව අපි එකල කීවෙමු.
(Research Report) Health-Related Information and COVID-19
Information collection (or data collection) is vital during an epidemic, especially for purposes such as contact tracing and quarantine monitoring. However, it also poses challenges such as keeping up with the spread of the infectious disease, and the need to protect personally identifiable information.
Links
Themes
- Disasters
- Inclusive Agriculture
- Capacity Building
- Data, Algorithms and Policy
- Education
- Megatrends
- Energy
- OpenGov
- Small and Medium Enterprises
- Future of Work
- Policy and Regulation
- COVID-19
- Social Safety Nets
- Human Rights Online
- Services for the Poor
- Misinformation and Language Resources
- Gender
- T@BOP
- Data for inclusive sustainable development
- Disability
- Data Governance
- AfterAccess
- CPRSouth
Contact
12, Balcombe Place, Colombo 08
Sri Lanka
+94 (0)11 267 1160
+94 (0)11 267 5212
info [at] lirneasia [dot] net
Copyright © 2024 LIRNEasia
a regional ICT policy and regulation think tank active across the Asia Pacific
1 Comment
Rahim
Please send me any article or research paper related to Wave forces and Tsunami.