Preprints
https://doi.org/10.5194/nhess-2022-69
https://doi.org/10.5194/nhess-2022-69
 
29 Mar 2022
29 Mar 2022
Status: a revised version of this preprint is currently under review for the journal NHESS.

Landslides triggered by the 2015 Mw 6.0 Sabah (Malaysia) earthquake: inventory and ESI-07 intensity assignment

Maria Francesca Ferrario Maria Francesca Ferrario
  • Università dell’Insubria, Dipartimento di Scienza e Alta Tecnologia, Como 22100, Italy

Abstract. On 4 June 2015, a Mw 6.0 earthquake occurred in the Sabah region (Malaysia), triggering widespread landslides along the slopes of Mt. Kinabalu. Despite the moderate magnitude, the Sabah earthquake was very efficient in triggering landslides: here I provide an inventory containing 5198 slope movements, mapped in an 810 km2-wide area. I investigate earthquake intensity using the Environmental Seismic Intensity (ESI-07) scale, which is a macroseismic scale based exclusively on earthquake environmental effects. The epicentral ESI-07 intensity is assessed at IX, considering the dimension of the area affected by secondary effects; such figure agrees well with a dataset of global earthquakes.

I estimate the volume of individual landslides using area-volume scaling laws, then I assigned an ESI-07 intensity to each mapped landslide. I document that the selection of a given area-volume relation has a minor influence on the ESI-07 assignment. Then, I compare ESI-07 values to landslide density and areal percentage on a 1-km2 grid; such parameters are widely adopted in the description of earthquake-triggered landslide inventories. I argue that their integration with the ESI-07 scale may provide an effective way to compare earthquake damage on a variety of spatial and temporal scales. The methodological workflow here illustrated is useful in joining the scientific communities dealing with the realization of earthquake-triggered landslide inventories and with ESI-07 assignment; I believe this effort is beneficial for both the communities.

Maria Francesca Ferrario

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2022-69', Anonymous Referee #1, 01 Apr 2022
    • AC1: 'Reply on RC1', Maria Francesca Ferrario, 20 Jun 2022
  • RC2: 'Comment on nhess-2022-69', Vipin Kumar, 30 Apr 2022
    • AC2: 'Reply on RC2', Maria Francesca Ferrario, 20 Jun 2022

Maria Francesca Ferrario

Maria Francesca Ferrario

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Short summary
I mapped over 5000 landslides triggered by a moment magnitude 6.0 earthquake occurred in 2015 in the Sabah region (Malaysia). I analyze their number, dimension and spatial distribution by dividing the territory in 1-km2 cells. I applied the Environmental Seismic Intensity (ESI-07) scale, which allows to categorize earthquake damage due to environmental effects. The presented approach promotes the collaboration among the experts in landslide mapping and in ESI-07 assignment.
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