Natural Hazards Theme News

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 ...

26 July 2018

Press, Research

Carbon dioxide eruptions triggered by the 2015 earthquake in Nepal

An international team has highlighted disturbances in the flow of gases and fluids in the Earth's crust following the Gorkha earthquake in 2015. These...

28 April 2018

Press, Research

Earthquake deficit and seismic hazard along the Levant Fault

Researchers from the Institut de Physique du Globe in Paris, in collaboration with scientists from Jordan's Ministry of Energy and Mineral Resources a...

18 April 2018

Press, Research

Gravimetric satellite data highlight deep deformations prior to the 2011 Tohoku earthquake

Giant earthquakes, such as the one off the coast of Tohoku, Japan, in 2011, are an extreme manifestation of plate tectonics. They most often occur in ...