BAQUES , Marion

The Ubaye region, located in the Alps at mid-distance between Grenoble and Nice, is one of the most seismically active areas in France. One of the strongest earthquakes recorded in mainland France occurred on April 5, 1959 (MLLDG 5.3). This region is characterized by a particular seismic activity composed of intertwined mainshock/aftershocks...

International audience

The Ubaye Region (French Western Alps) is one of the most seismically active regions in France. It is regularly struck by mainshock–aftershocks sequences like in 1959 (ML 5.3), seismic swarms (2003–2004), and complex sequences (2012–2015) characterized by successive mainshocks clustered in time and space. This diversity of seismic behaviour...

International audience

Using earthquakes and seismic noise recordings on a broad-band station installed in October 2016 on the slope of the Nice airport at 17 m depth, we find a strong site amplification of the seismic waves (factor 10 around a frequency of 1Hz).The effects of superficial layers on the amplitude, frequency and duration of seismic waves (often called...

The Ubaye Region is the most seismically active region in the Western Alps, with earthquakes that were commonly felt by the population and that even damaged local villages and cities. Since the 18th century, this area has been regularly struck by seismic swarms with high number of events, such as in 2003-2004 or 2012-2016 or by...

International audience

The upper part of the Ubaye Valley (French Alps) is characterized by alternating mainshock‐aftershock sequences and swarms. Particularly, during the 2012–2015 crisis, four mainshocks with Ml > 3.5 occurred. We here focus on the aftershocks of the largest one (Ml = 4.8, 7 April 2014), in order to better understand the involved processes behind...

The Ubaye Region is the most seismically active region in the Western Alps, with earthquakesthat were commonly felt by the population and that even damaged local villages and cities. Since thefirst testimonies in 1844, this area has been regularly struck by seismic swarms with a high number ofevents, such as in 2003–2004 or 2012–2015, or by...

A broadband seismological station (PRIMA) installed offshore Nice airport (southeastern France) reveals a strong amplification effect of seismic waves. PRIMA station was in operation for 2 years (9/2016 to 10/2018) on the outer shelf at a water depth of 18 m. Situated at the mouth of the Var River, this zone is unstable and prone to landslides....

In many seismically active areas of the world, earthquake-induced landslides commonly account for a significant portion of the total impact of earthquakes. When landslides occur offshore, in coastal areas, they can generate proximal tsunami waves that reach the coastlines in only a few minutes, and can be very dangerous.The triggering power of...

The Ubaye Region is a seismically active region in the Western Alps (France), regularly struck by seismic swarms characterized by a high number of small to moderate earthquakes, such as in 2003–2004 or 2012–2015. While some earthquakes could be associated with known faults, the character of the observations (high seismicity – low deformation...