Technical Note: An operational landslide early warning system at regional scale based on space–time-variable rainfall thresholds

Segoni, S.; Battistini, A.; Rossi, G.; Rosi, A.; Lagomarsino, D.; Catani, F.; Moretti, S.; Casagli, N.

doi:https://doi.org/10.5194/nhess-15-853-2015

Articles | Volume 15, issue 4

https://doi.org/10.5194/nhess-15-853-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Landslide Prediction & Forecasting

https://doi.org/10.5194/nhess-15-853-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 4

Research article

|

16 Apr 2015

Research article |

| 16 Apr 2015

Technical Note: An operational landslide early warning system at regional scale based on space–time-variable rainfall thresholds

S. Segoni, A. Battistini, G. Rossi, A. Rosi, D. Lagomarsino, F. Catani, S. Moretti, and N. Casagli

Viewed

Total article views: 5,267 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	BibTeX	EndNote
2,968	2,144	155	5,267	180	202

HTML: 2,968
PDF: 2,144
XML: 155
Total: 5,267
BibTeX: 180
EndNote: 202

Views and downloads (calculated since 22 Oct 2014)

Month	HTML	PDF	XML	Total
Oct 2014	28	42	1	71
Nov 2014	19	23	0	42
Dec 2014	17	21	1	39
Jan 2015	19	16	0	35
Feb 2015	6	15	0	21
Mar 2015	8	9	0	17
Apr 2015	100	77	2	179
May 2015	58	42	1	101
Jun 2015	38	18	0	56
Jul 2015	45	21	0	66
Aug 2015	22	24	1	47
Sep 2015	9	16	2	27
Oct 2015	20	16	1	37
Nov 2015	32	26	2	60
Dec 2015	11	27	0	38
Jan 2016	33	21	1	55
Feb 2016	18	12	1	31
Mar 2016	15	11	0	26
Apr 2016	8	5	0	13
May 2016	8	6	0	14
Jun 2016	5	8	1	14
Jul 2016	10	7	2	19
Aug 2016	6	8	0	14
Sep 2016	12	16	0	28
Oct 2016	5	4	0	9
Nov 2016	7	10	1	18
Dec 2016	4	6	0	10
Jan 2017	15	14	0	29
Feb 2017	7	8	0	15
Mar 2017	11	11	0	22
Apr 2017	13	11	0	24
May 2017	26	12	0	38
Jun 2017	13	3	0	16
Jul 2017	15	12	0	27
Aug 2017	12	10	1	23
Sep 2017	17	11	1	29
Oct 2017	8	7	0	15
Nov 2017	13	18	0	31
Dec 2017	16	12	1	29
Jan 2018	22	21	4	47
Feb 2018	9	11	0	20
Mar 2018	23	20	2	45
Apr 2018	11	11	0	22
May 2018	8	21	0	29
Jun 2018	8	11	0	19
Jul 2018	12	16	4	32
Aug 2018	23	16	1	40
Sep 2018	18	17	0	35
Oct 2018	22	17	2	41
Nov 2018	25	17	0	42
Dec 2018	16	21	0	37
Jan 2019	16	20	3	39
Feb 2019	9	19	0	28
Mar 2019	7	23	0	30
Apr 2019	8	17	1	26
May 2019	12	21	0	33
Jun 2019	10	23	0	33
Jul 2019	7	12	0	19
Aug 2019	17	17	0	34
Sep 2019	8	8	0	16
Oct 2019	11	9	1	21
Nov 2019	17	17	1	35
Dec 2019	15	14	0	29
Jan 2020	25	17	2	44
Feb 2020	6	7	0	13
Mar 2020	11	12	0	23
Apr 2020	11	4	0	15
May 2020	8	6	0	14
Jun 2020	25	11	2	38
Jul 2020	36	30	15	81
Aug 2020	19	12	12	43
Sep 2020	13	8	0	21
Oct 2020	7	8	1	16
Nov 2020	11	14	2	27
Dec 2020	20	28	0	48
Jan 2021	25	14	0	39
Feb 2021	23	8	0	31
Mar 2021	17	16	0	33
Apr 2021	7	12	0	19
May 2021	6	12	1	19
Jun 2021	13	7	0	20
Jul 2021	18	10	0	28
Aug 2021	10	14	2	26
Sep 2021	13	17	0	30
Oct 2021	17	42	0	59
Nov 2021	23	34	0	57
Dec 2021	18	16	0	34
Jan 2022	26	21	1	48
Feb 2022	15	11	3	29
Mar 2022	21	12	0	33
Apr 2022	27	12	2	41
May 2022	45	12	3	60
Jun 2022	25	7	0	32
Jul 2022	16	7	0	23
Aug 2022	26	13	0	39
Sep 2022	20	14	0	34
Oct 2022	15	10	2	27
Nov 2022	21	21	1	43
Dec 2022	20	12	1	33
Jan 2023	32	25	2	59
Feb 2023	24	19	1	44
Mar 2023	31	27	3	61
Apr 2023	26	32	1	59
May 2023	18	17	4	39
Jun 2023	20	14	1	35
Jul 2023	16	9	1	26
Aug 2023	26	8	3	37
Sep 2023	30	14	1	45
Oct 2023	133	8	0	141
Nov 2023	81	5	0	86
Dec 2023	23	10	1	34
Jan 2024	23	12	1	36
Feb 2024	30	9	1	40
Mar 2024	26	29	2	57
Apr 2024	28	30	2	60
May 2024	37	17	5	59
Jun 2024	30	9	1	40
Jul 2024	35	20	3	58
Aug 2024	36	24	8	68
Sep 2024	26	19	7	52
Oct 2024	37	8	2	47
Nov 2024	23	8	1	32
Dec 2024	17	13	1	31
Jan 2025	25	30	0	55
Feb 2025	35	11	1	47
Mar 2025	41	16	0	57
Apr 2025	38	19	1	58
May 2025	28	14	1	43
Jun 2025	45	25	2	72
Jul 2025	74	18	3	95
Aug 2025	56	21	3	80
Sep 2025	54	25	1	80
Oct 2025	37	27	2	66
Nov 2025	5	6	0	11

Cumulative views and downloads (calculated since 22 Oct 2014)

Month	HTML	PDF	XML	Total
Oct 2014	28	42	1	71
Nov 2014	19	23	0	42
Dec 2014	17	21	1	39
Jan 2015	19	16	0	35
Feb 2015	6	15	0	21
Mar 2015	8	9	0	17
Apr 2015	100	77	2	179
May 2015	58	42	1	101
Jun 2015	38	18	0	56
Jul 2015	45	21	0	66
Aug 2015	22	24	1	47
Sep 2015	9	16	2	27
Oct 2015	20	16	1	37
Nov 2015	32	26	2	60
Dec 2015	11	27	0	38
Jan 2016	33	21	1	55
Feb 2016	18	12	1	31
Mar 2016	15	11	0	26
Apr 2016	8	5	0	13
May 2016	8	6	0	14
Jun 2016	5	8	1	14
Jul 2016	10	7	2	19
Aug 2016	6	8	0	14
Sep 2016	12	16	0	28
Oct 2016	5	4	0	9
Nov 2016	7	10	1	18
Dec 2016	4	6	0	10
Jan 2017	15	14	0	29
Feb 2017	7	8	0	15
Mar 2017	11	11	0	22
Apr 2017	13	11	0	24
May 2017	26	12	0	38
Jun 2017	13	3	0	16
Jul 2017	15	12	0	27
Aug 2017	12	10	1	23
Sep 2017	17	11	1	29
Oct 2017	8	7	0	15
Nov 2017	13	18	0	31
Dec 2017	16	12	1	29
Jan 2018	22	21	4	47
Feb 2018	9	11	0	20
Mar 2018	23	20	2	45
Apr 2018	11	11	0	22
May 2018	8	21	0	29
Jun 2018	8	11	0	19
Jul 2018	12	16	4	32
Aug 2018	23	16	1	40
Sep 2018	18	17	0	35
Oct 2018	22	17	2	41
Nov 2018	25	17	0	42
Dec 2018	16	21	0	37
Jan 2019	16	20	3	39
Feb 2019	9	19	0	28
Mar 2019	7	23	0	30
Apr 2019	8	17	1	26
May 2019	12	21	0	33
Jun 2019	10	23	0	33
Jul 2019	7	12	0	19
Aug 2019	17	17	0	34
Sep 2019	8	8	0	16
Oct 2019	11	9	1	21
Nov 2019	17	17	1	35
Dec 2019	15	14	0	29
Jan 2020	25	17	2	44
Feb 2020	6	7	0	13
Mar 2020	11	12	0	23
Apr 2020	11	4	0	15
May 2020	8	6	0	14
Jun 2020	25	11	2	38
Jul 2020	36	30	15	81
Aug 2020	19	12	12	43
Sep 2020	13	8	0	21
Oct 2020	7	8	1	16
Nov 2020	11	14	2	27
Dec 2020	20	28	0	48
Jan 2021	25	14	0	39
Feb 2021	23	8	0	31
Mar 2021	17	16	0	33
Apr 2021	7	12	0	19
May 2021	6	12	1	19
Jun 2021	13	7	0	20
Jul 2021	18	10	0	28
Aug 2021	10	14	2	26
Sep 2021	13	17	0	30
Oct 2021	17	42	0	59
Nov 2021	23	34	0	57
Dec 2021	18	16	0	34
Jan 2022	26	21	1	48
Feb 2022	15	11	3	29
Mar 2022	21	12	0	33
Apr 2022	27	12	2	41
May 2022	45	12	3	60
Jun 2022	25	7	0	32
Jul 2022	16	7	0	23
Aug 2022	26	13	0	39
Sep 2022	20	14	0	34
Oct 2022	15	10	2	27
Nov 2022	21	21	1	43
Dec 2022	20	12	1	33
Jan 2023	32	25	2	59
Feb 2023	24	19	1	44
Mar 2023	31	27	3	61
Apr 2023	26	32	1	59
May 2023	18	17	4	39
Jun 2023	20	14	1	35
Jul 2023	16	9	1	26
Aug 2023	26	8	3	37
Sep 2023	30	14	1	45
Oct 2023	133	8	0	141
Nov 2023	81	5	0	86
Dec 2023	23	10	1	34
Jan 2024	23	12	1	36
Feb 2024	30	9	1	40
Mar 2024	26	29	2	57
Apr 2024	28	30	2	60
May 2024	37	17	5	59
Jun 2024	30	9	1	40
Jul 2024	35	20	3	58
Aug 2024	36	24	8	68
Sep 2024	26	19	7	52
Oct 2024	37	8	2	47
Nov 2024	23	8	1	32
Dec 2024	17	13	1	31
Jan 2025	25	30	0	55
Feb 2025	35	11	1	47
Mar 2025	41	16	0	57
Apr 2025	38	19	1	58
May 2025	28	14	1	43
Jun 2025	45	25	2	72
Jul 2025	74	18	3	95
Aug 2025	56	21	3	80
Sep 2025	54	25	1	80
Oct 2025	37	27	2	66
Nov 2025	5	6	0	11

Latest update: 07 Nov 2025

Short summary

We monitor and forecast (with lead times up to 48h) regional-scale landslide hazard with an early warning system (EWS) implemented on a user-friendly WebGIS interface. The EWS detects the most critical rainfall conditions using a mosaic of 25 site-specific thresholds. Moreover, when the rainfall paths recorded by the instruments are compared with the thresholds, the thresholds are shifted in the time axis and adjusted to all possible starting times until the most hazardous scenario is found.