The last stations of the MACIV temporary broadband network (network code XP) have been installed on January 24 & 25, 2024.
These last stations are FR14B and FR11A, installed in Marols (42) and Pommiers-en-Forez (42), respectively.

Read more

From 10 to 14 June, 2024, 10 people from ISTerre and LMV have installed 25 new seismic stations along the N-S, E-W and diagonal profiles of the MACIV experiment (red diamonds on the map below).
The 40 remaining stations will be installed in the first week of July (4 stations), then in the fall of 2024.
These stations belong to the temporary network with code XF_2024.

Read more

From 30 September to 4 October, 2024, 9 people from ISTerre and the LMV have installed 23 additional seismological stations along the North-South and East-West profiles of the MACIV experiment.
The remaining 13 stations will be installed before the end of November 2024.
These stations belong to the temporary XF network.

Read more

On 29 January 2025, colleagues from Toulouse have installed the last MACIV profile station, MN29A, in the municipality of Félines-Minervois (34).
The XF network is now fully installed, with 65 stations.
This installation completes the deployment of the two temporary networks of MACIV broadband stations, with a total of 100 stations in the field until 2027 : XP : blue stars on the map, 35 stations throughout the French Massif Central, complementing the permanent networks (black stars), (…)

Read more

We are looking for applicants who hold, or will hold, a Master degree for a PhD thesis at ISTerre (Univ. Grenoble Alpes - UGA) entitled :
Multi-scale noise-based seismic imaging of the French Massif Central with the data of MACIV experiment.
Applicants will have to pass the 2025 selection process of the UGA STEP (Earth and Planetary Science) Doctoral School to obtain a doctoral grant.
If funding is obtained, the thesis could start on Oct. 1, 2025.
Detailed information and (…)

Read more

The paper entitled "The MACIV multiscale seismic experiments in the French Massif Central (2023-2027) : deployment, data quality and availability" by Aubert et al. is now published in Annals of Geophysics, special issue on "Recent large-scale temporary passive seismic experiments in Europe : deployment and data quality" : doi:10.4401/ag-9264.

Read more

A recent study published in Geophysical Research Letters by the MACIV Team (Shapiro et al., doi:10.1029/2025GL114904) reveals atypical seismic signals beneath the volcanoes of the Massif Central. These signals, associated with the active presence of magma at depth, suggest that the magma reservoirs of the Chaîne des Puys and the Pavin maar may still be active, despite 6,700 years of volcanic dormancy.

Read more

A large-magnitude earthquake occurred on July 29, 2025, at 23:24 (UTC), off the southeast coast of the Kamchatka Peninsula, Russia. Its moment magnitude Mw is 8.8.
This is the strongest earthquake since the Tohoku-Oki earthquake (off the coast of Japan) on March 9, 2011 (Mw=9.1), and the eighth strongest earthquake recorded by global seismological networks.
More info : Euro-Mediterranean Seismological Center : CSEM/EMSC and U.S. Geological Survey : USGS.
The Figure below shows : Left (…)

Read more

From September 15 to 24, 2025, seven teams of two people installed 624 mini-seismological stations (called “nodes”) on the most recent volcanoes in the Massif Central, Chaîne des Puys, and Monts-Dore.
This is the largest seismological network ever installed by a university team, in terms of both the number of instruments (624) and the area covered by the network (80 km x 100 km).

Read more