Himalayan Range (01:55)
The Himalaya is a land of geological extremes and home to the world's tallest mountains; the mountain range altered the Earth's climate. Geologic activity reshapes the landscape and scientists monitor tectonic movement.
Gorkha Earthquake (04:12)
The 2015 earthquake that killed 9,000 people was a scientific turning point; scientists had predicted a major quake. The seismic threat emanates mainly from the Main Himalayan Thrust fault. Megathrust earthquakes struck Chile and Tohoku, resulting in tsunamis.
Himalaya Megathrust (03:03)
Scientists study the megathrust below the Himalaya; the Indian Plate steadily moves into Asia. Seismic gaps appear on the Main Himalayan Thrust fault; western Nepal is the most worrisome gap.
Locked Faults (02:41)
A seismic gap that has been dormant for 450 years spans Jammu and Kashmir; the gap beneath Bhutan has been quiet for 300 years. Tourism is growing in Bhutan; scientists fear buildings will not withstand a major quake.
Tibetan Plateau (04:20)
The plateau is the largest and highest plateau on Earth; large upliftings change global climate. Tibet has experienced several large earthquakes. Scientists attempt to understand the position of the tectonic plates.
Scientific Expedition in Mongolia (06:23)
Karl Wegmann studies the unusual uprising of land in the center of the continent. Geochemists examine the flanks of dormant volcanoes and determine the origin of the high terrain. Three large earthquakes struck the region in the last century as a result of stress from the Indian and Asian plates.
Burma Arc (03:26)
The Main Himalayan Thrust Fault becomes a subduction zone and marks the collision of the Indian and Asian plates. The people in Bangladesh are not prepared for a major earthquake; scientists work to identify the most dangerous faults.
Surface Landscape (03:36)
Steven Goodbred and his team study the surface of Bangladesh. The Indian monsoon significantly affects surface activity. One tenth of the Earth's land supports nearly half the world's population
Ganges Brahmaputra Delta (05:32)
The Ganges and Brahmaputra rivers bring sediment from the Himalayas to the world's largest delta. Over 1 billion tons of sediment arrives in Bangladesh ever year, burying the major faults. The Ganges River flowed through Kolkata to the Sundarbans until the 1600s.
River Impact (02:43)
The diversion of the Ganges River resulted in a loss of sediment on the Indian side of the Sundarbans, leading to erosion and land loss. Himalayan rivers protect the Bangladesh side of the Sundarbans.
Surface and Seismic Activities (05:22)
Data suggests that tectonic plate movement is warping the sediment in the Ganges Brahmaputra Delta. Samples explain the movement of the Ganges and Brahmaputra rivers; experts measure electric resistivity in the sediment. Scientists study the 1897 Assam megaquake and discover worrisome information about the Dauki Fault.
Seismic Threat (03:45)
Scientists examine areas east and south of Dhaka. In 2004, a tsunami struck the coast of Indonesia; the initiating earthquake struck the same plate boundary as the Burma Arc. Aizawl, India last experienced a major quake 250 years ago.
Burma Arc Megathrust (02:03)
Scientists map the megathrust fault. Data reveals the seismic gap between Dhaka and Aizawl is locked and building stress.
Megaquake Preparations (04:53)
Construction methods in the region are a concern. Experts in Aizawl push for building codes addressing earthquake safety; those in Dhaka want codes modernized and enforced. Other safety measures are planned.
Himalaya Review (01:42)
Natural forces are a part of life in the Himalaya and the lands that are geologically connected. Review the topics discussed in this video.
Credits: The Himalaya Connection (01:26)
Credits: The Himalaya Connection
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