GeoLog

natural disasters

What if a tsunami’s magnetic field could predict the height of the wave?

January 12, 2022
What if a tsunami’s magnetic field could predict the height of the wave?
Atmospheric gravity waves . Credit: Jorge Magalhaes and Jose da Silva (distributed via imaggeo.egu.eu)

It’s been well established that tsunamis generate magnetic fields as they move seawater (which is conductive unlike freshwater) through the Earth’s magnetic field. Although researchers previously predicted that the tsunami’s magnetic field would arrive before a change in sea level, they lacked the means to simultaneously measure magnetics and sea level to confirm this phenomenon. Now, a new study ...[Read More]

A better framework for disasters

November 13, 2018
A better framework for disasters
The 2018 Carr Fire that burned 229,651 acres in California. It's currently listed as the seventh-largest wildfire recorded in the state's modern history. (Photo: Bureau of Land Management California via Bureau of Land Management California)

The end of the Northern hemisphere summer tends to be a good time to regroup from natural hazards, as the frequency and intensity of storms, as well as the incidence of wildfires, tends to trail off. At the time of writing, however, Hurricane Willa had just crashed into Mexico, while Typhoon Yutu has just hit the Northern Mariana Islands so hard that any equipment designed to record wind-speed had ...[Read More]

Top ten tourist beaches threatened by tsunamis

May 23, 2018
Top ten tourist beaches threatened by tsunamis
A street in Phuket, Thailand after the 2004 tsunami. Six months after the tsunami, a quarter of the islands's hotels closed. (Image Credit: Alonso de Mendoza / Wikimedia Commons)

December 2004 saw one of the deadliest natural disasters in recorded history. 228,000 people were killed when an earthquake off the coast of the Indonesian island of Sumatra triggered tsunami waves up to 30 m high. The destruction was extreme as the waves hit 14 different countries around the Indian Ocean. Economic losses totalled over 10 billion US dollars. The tourism industry in particular suff ...[Read More]

Geosciences Column: Extreme snowfall potentially worsened Nepal’s 2015 earthquake-triggered avalanche

May 11, 2018
Geosciences Column: Extreme snowfall potentially worsened Nepal’s 2015 earthquake-triggered avalanche
A view of Langtang Nepal in 2012. The village was struck by an earthquake-induced avalanche and landslides in 2015, burying the town in debris. (Credit: Sander van Dijk via Flickr)

Three years ago, an earthquake-induced avalanche and rockfalls buried an entire Nepalese village in ice, stone, and snow. Researchers now think the region’s heavy snowfall from the preceding winter may have intensified the avalanche’s disastrous effect. The Langtang village, just 70 kilometres from Nepal’s capital Kathmandu, is nestled within a valley under the shadow of the Himalayas. The town wa ...[Read More]