Natural Hazards Theme News

15 January 2020

Observatories, Press, Research

Optical fiber available to researchers to better understand Mayotte earthquakes

Orange and the members of the FLY-LION3 (Lower Indian Ocean Network) consortium - Société Réunionnaise du Radiotéléphone and Comores Câbles - announce...

19 December 2019

Observatories, Press, Research

Monitoring deformation in Mayotte using satellite radar interferometry

Since May 2018, the island of Mayotte has been experiencing a seismo-volcanic crisis on an unprecedented scale. Numerous earthquakes are being felt by...

09 October 2019

Press, Research

Towards a better understanding of mega-earthquake triggering mechanisms

In a recently published study, IPGP researchers and their colleague show that fluid pressure variations in subduction zones control, over the long ter...

02 August 2019

Observatories, Press, Research

Earthquakes and volcanoes in Mayotte: conclusions of the last two sea campaigns

The MAYOBS 3 and 4 campaigns identified a new lava flow and produced the first images of the seabed. Meetings and debriefings with the various stakeho...

27 June 2019

Observatories, Press, Research

Earthquakes and volcanoes in Mayotte: conclusions of the second oceanographic campaign

A scientific team took part in a second oceanographic campaign entitled "MAYOBS2", from June 11th to 17th, 2019.

07 June 2019

Observatories, Press, Research

Very long-period and ultra-long-period seismic signals detected before and during the formation of the Dolomieu caldera on Reunion Island in 2007

Caldera collapses (giant circular or elliptical volcanic craters formed by the emptying of the magma chamber) are rare phenomena. Only seven have occu...

16 May 2019

General public, Observatories, Press, Research

Discovery of the birth of a new underwater volcano to the east of Mayotte

Interministerial press release - Discovery of the birth of a new underwater volcano to the east of Mayotte: improving our knowledge and preventing ris...

24 April 2019

Press, Research

Observation of early signals of disruption of the Earth's gravity field linked to multiple earthquakes

These new observations of gravity disturbances, preceding seismic waves, confirm the potential of these signals for earthquake early warning systems.

10 December 2018

Press, Research

Highly hydrated magmas stored in a mush at great depths, the source of Dominica's great pumice eruptions

In the past, the island of Dominica has experienced ignimbritic pumiceous eruptions involving large volumes of magma (4-5 km3 DRE). A study of more th...

14 November 2018

Observatories, Press, Research

Outgassing in the upper mantle: constraints on the source and evolution of volcanic CO2

By combining barometry and the composition of fluid inclusions trapped within lava crystals and recent enclaves in the Piton de la Fournaise, a new st...

30 October 2018

Observatories, Press, Research

Study of the unstable zones around the Dolomieu crater and assessment of the risks for visitors

In April 2007, the morphology of the summit of Piton de la Fournaise changed radically. Its main crater, the Dolomieu, previously filled to the rim wi...

29 October 2018

General public, Observatories, Press, Research

Piton de la Fournaise's ten-year eruptive cycles linked to the fertility of its mantle source

Piton de la Fournaise (Réunion Island) is one of the most active volcanoes on the planet. However, it has alternating periods of intense activity (12 ...