Seismic and mechanical studies of the artificially triggered rockfall at Mount Néron (French Alps, December 2011)

Bottelin, P.; Jongmans, D.; Daudon, D.; Mathy, A.; Helmstetter, A.; Bonilla-Sierra, V.; Cadet, H.; Amitrano, D.; Richefeu, V.; Lorier, L.; Baillet, L.; Villard, P.; Donzé, F.

doi:10.5194/nhess-14-3175-2014

Articles | Volume 14, issue 12

https://doi.org/10.5194/nhess-14-3175-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/nhess-14-3175-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 14, issue 12

Research article

|

02 Dec 2014

Research article |

| 02 Dec 2014

Seismic and mechanical studies of the artificially triggered rockfall at Mount Néron (French Alps, December 2011)

P. Bottelin, D. Jongmans, D. Daudon, A. Mathy, A. Helmstetter, V. Bonilla-Sierra, H. Cadet, D. Amitrano, V. Richefeu, L. Lorier, L. Baillet, P. Villard, and F. Donzé

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Feb 2014	36	26	3	65
Mar 2014	20	43	4	67
Apr 2014	20	31	1	52
May 2014	26	21	2	49
Jun 2014	10	14	2	26
Jul 2014	32	19	3	54
Aug 2014	17	15	1	33
Sep 2014	36	9	1	46
Oct 2014	23	10	2	35
Nov 2014	12	17	0	29
Dec 2014	76	81	7	164
Jan 2015	42	180	6	228
Feb 2015	28	14	2	44
Mar 2015	17	12	0	29
Apr 2015	35	5	3	43
May 2015	17	11	1	29
Jun 2015	29	2	4	35
Jul 2015	35	5	1	41
Aug 2015	27	10	7	44
Sep 2015	5	11	1	17
Oct 2015	17	11	1	29
Nov 2015	23	19	5	47
Dec 2015	8	12	0	20
Jan 2016	26	12	2	40
Feb 2016	16	8	4	28
Mar 2016	9	2	1	12
Apr 2016	5	4	2	11
May 2016	7	6	1	14
Jun 2016	3	3	0	6
Jul 2016	4	1	3	8
Aug 2016	7	1	1	9
Sep 2016	8	3	1	12
Oct 2016	7	5	1	13
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Dec 2016	3	4	0	7
Jan 2017	8	2	2	12
Feb 2017	6	6	6	18
Mar 2017	12	4	11	27
Apr 2017	18	12	9	39
May 2017	13	10	10	33
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Jul 2017	14	7	9	30
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Feb 2018	12	11	10	33
Mar 2018	12	9	10	31
Apr 2018	4	8	4	16
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Sep 2018	16	15	3	34
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Nov 2018	20	10	4	34
Dec 2018	23	7	0	30
Jan 2019	20	12	4	36
Feb 2019	28	10	2	40
Mar 2019	9	9	1	19
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May 2019	11	7	0	18
Jun 2019	5	17	0	22
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Aug 2019	12	10	2	24
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Oct 2019	8	7	1	16
Nov 2019	4	6	0	10
Dec 2019	2	6	3	11
Jan 2020	9	11	2	22
Feb 2020	6	4	3	13
Mar 2020	3	5	0	8
Apr 2020	7	7	4	18
May 2020	6	5	1	12
Jun 2020	18	6	0	24
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Aug 2020	10	15	9	34
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Oct 2020	4	20	1	25
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Mar 2021	8	11	1	20
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Oct 2021	11	37	1	49
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May 2022	5	9	4	18
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Jan 2023	16	21	3	40
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Apr 2023	5	8	0	13
May 2023	7	10	3	20
Jun 2023	5	10	0	15
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Aug 2023	8	4	2	14
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Oct 2023	7	6	0	13
Nov 2023	1	1	0	2
Dec 2023	16	9	1	26
Jan 2024	8	5	0	13
Feb 2024	6	5	0	11
Mar 2024	8	8	1	17
Apr 2024	20	10	6	36
May 2024	13	13	4	30
Jun 2024	7	8	2	17
Jul 2024	21	11	4	36
Aug 2024	16	5	2	23
Sep 2024	6	7	2	15
Oct 2024	12	7	1	20
Nov 2024	8	9	0	17
Dec 2024	5	8	2	15
Jan 2025	8	9	0	17
Feb 2025	18	11	2	31
Mar 2025	21	15	1	37
Apr 2025	26	11	0	37
May 2025	18	11	0	29
Jun 2025	39	14	0	53
Jul 2025	40	24	3	67
Aug 2025	14	15	0	29
Sep 2025	31	17	1	49
Oct 2025	15	25	3	43
Nov 2025	22	39	2	63

Cumulative views and downloads (calculated since 14 Feb 2014)

Month	HTML	PDF	XML	Total
Feb 2014	36	26	3	65
Mar 2014	20	43	4	67
Apr 2014	20	31	1	52
May 2014	26	21	2	49
Jun 2014	10	14	2	26
Jul 2014	32	19	3	54
Aug 2014	17	15	1	33
Sep 2014	36	9	1	46
Oct 2014	23	10	2	35
Nov 2014	12	17	0	29
Dec 2014	76	81	7	164
Jan 2015	42	180	6	228
Feb 2015	28	14	2	44
Mar 2015	17	12	0	29
Apr 2015	35	5	3	43
May 2015	17	11	1	29
Jun 2015	29	2	4	35
Jul 2015	35	5	1	41
Aug 2015	27	10	7	44
Sep 2015	5	11	1	17
Oct 2015	17	11	1	29
Nov 2015	23	19	5	47
Dec 2015	8	12	0	20
Jan 2016	26	12	2	40
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Nov 2018	20	10	4	34
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Feb 2019	28	10	2	40
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Jun 2022	6	5	0	11
Jul 2022	3	5	0	8
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Oct 2022	11	6	1	18
Nov 2022	25	16	1	42
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Jan 2023	16	21	3	40
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Jan 2024	8	5	0	13
Feb 2024	6	5	0	11
Mar 2024	8	8	1	17
Apr 2024	20	10	6	36
May 2024	13	13	4	30
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Dec 2024	5	8	2	15
Jan 2025	8	9	0	17
Feb 2025	18	11	2	31
Mar 2025	21	15	1	37
Apr 2025	26	11	0	37
May 2025	18	11	0	29
Jun 2025	39	14	0	53
Jul 2025	40	24	3	67
Aug 2025	14	15	0	29
Sep 2025	31	17	1	49
Oct 2025	15	25	3	43
Nov 2025	22	39	2	63

Latest update: 25 Nov 2025

Short summary

Two mid-size rockfalls (~2,000 m3 each) occurred at the same place in 2011. While the first event was natural, the second one was artificially triggered and recorded by video cameras and seismic sensors. The measurements showed propagation velocities ranging from 12 to 30 m/s over the successive event phases. The most seismogenic phases were related to ground impact after free-fall and individual block impacts into a protective barrier. DEM reproduced the key features of the rockfall dynamics.