@article{fdi:010084775, title = {{S}eismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with {S}torm {A}lex [{B}rief communication]}, author = {{C}hmiel, {M}. and {G}odano, {M}. and {P}iantini, {M}. and {B}rigode, {P}. and {G}imbert, {F}. and {B}akker, {M}. and {C}ourboulex, {F}. and {A}mpuero, {J}ean-{P}aul and {R}ivet, {D}. and {S}laden, {A}. and {A}mbrois, {D}. and {C}hapuis, {M}.}, editor = {}, language = {{ENG}}, abstract = {{O}n 2 {O}ctober 2020, the {M}aritime {A}lps in southern {F}rance were struck by the devastating {S}torm {A}lex, which caused locally more than 600 mm of rain in less than 24 h. {T}he extreme rainfall and flooding destroyed regional rain and stream gauges. {T}hat hinders our understanding of the spatial and temporal dynamics of rainfall-runoff processes during the storm. {H}ere, we show that seismological observations from permanent seismic stations constrain these processes at a catchment scale. {T}he analysis of seismic power, peak frequency, and the back azimuth provides us with the timing and velocity of the propagation of flash-flood waves associated with bedload-dominated phases of the flood on the {V}esubie {R}iver. {M}oreover, the combined short-term average to long-term average ratio and template-matching earthquake detection reveal that 114 local earthquakes between local magnitude {M}-{L} = -0.5 and {M}-{L} = 2 were triggered by the hydrological loading and/or the resulting in situ underground pore pressure increase. {T}his study shows the impact of {S}torm {A}lex on the {E}arth's surface and deep-layer processes and paves the way for future works that can reveal further details of these processes.}, keywords = {{FRANCE} ; {ALPES} {MARITIMES}}, booktitle = {}, journal = {{N}atural {H}azards and {E}arth {S}ystem {S}ciences}, volume = {22}, numero = {5}, pages = {1541--1558}, ISSN = {1561-8633}, year = {2022}, DOI = {10.5194/nhess-22-1541-2022}, URL = {https://www.documentation.ird.fr/hor/fdi:010084775}, }