PHIVOLCS earthquake intensity scale
The PHIVOLCS earthquake intensity scale (PEIS; Filipino: Panukat ng Pagyanig ng Lindol)[1] is a seismic scale used and developed by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) to measure the intensity of earthquakes.
It was developed as upon a specific response to the 1990 Luzon earthquake. PHIVOLCS cites seismic scale specifically developed for the Philippine setting, the different geography of each country and other "geological considerations" led to the development of PEIS. The scale measures the effect of an earthquake on a given area based on its relative effect to people, structures and objects in the surroundings.[2]
The PEIS was adopted in the Philippines in 1996 replacing the Rossi-Forel scale.[3]
Scales
[edit]The PEIS has ten intensity scales represented in Roman numerals with Intensity I being the weakest and Intensity X being the strongest.[3]
PHIVOLCS Earthquake Intensity Scale (PEIS)[3][4][1] Panukat ng Pagyanig ng Lindol | ||||
---|---|---|---|---|
Intensity Scale |
Description | Equivalent to other seismic scales[5] | ||
Modified Mercalli |
Shindo | |||
I | Scarcely perceptible (Napakahina) |
|
I | 0 |
II | Slightly felt (Bahagyang naramdaman) |
|
II | 1 |
III | Weak (Mahina) |
|
III | 2 |
IV | Moderately strong (Bahagyang malakas) |
|
IV | 3 |
V | Strong (Malakas) |
|
V | 4 |
VI | Very strong (Napakalakas) |
|
VI | 5- |
VII | Destructive (Mapaminsala) |
|
VII | 5+ |
VIII | Very destructive (Lubusang mapaminsala) |
|
VIII, IX | 6-, 6+ |
IX | Devastating (Mapanalanta) |
|
X, XI | 7 |
X | Completely devastating (Lubusang mapanalanta) |
|
XII |
References
[edit]- ^ a b "Pocketsize - PHIVOLCS Earthquake Intensity Scale PEIS Filipino". Philippine Institute of Volcanology and Seismology. 2015.
- ^ "'Shaking Table' at Phivolcs helps Pinoys prepare for quakes". GMA News. January 20, 2010. Retrieved February 12, 2017.
- ^ a b c "Making sense of the PHIVOLCS earthquake intensity levels". Official Gazette of the Republic of the Philippines. Retrieved February 12, 2017.
- ^ "PHIVOLCS Earthquake Intensity Scale (PEIS)". Philippine Institute of Volcanology and Seismology. Retrieved September 11, 2021.
- ^ "Final Report" (PDF). Earthquake Impact Reduction Study for Metropolitan Manila, Republic of the Philippines. 1 (Executive Study). Japan International Cooperation Agency, Metropolitan Manila Development Authority, Philippine Institute of Volcanology and Seismology; Pacific Consultants International, OYO International Corporation, PASCO Corporation (consultants): 14. March 2004. Retrieved February 12, 2017.
- Public domain sources
This article incorporates text from this source, which is in the public domain: "Making sense of the PHIVOLCS earthquake intensity levels". Official Gazette of the Republic of the Philippines. Retrieved February 12, 2017.
This article incorporates text from this source, which is in the public domain: "PHIVOLCS Earthquake Intensity Scale (PEIS)". Philippine Institute of Volcanology and Seismology. Retrieved September 11, 2021.
External links
[edit]- PHIVOLCS Earthquake Intensity Scale at the Philippine Institute of Volcanology and Seismology
Modern scales |
| ||||
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Historical scales |
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