Establishment of Earthquake Intensity Meter Network in the Philippines

Lasala, Melchor; Inoue, Hiroshi; Tiglao, Roberto B.; Fan, Zhengying; Bautista, Bartolome C.; Narag, Ishmael C.

doi:10.20965/jdr.2015.p0043

Cited by 8 publications

(9 citation statements)

References 3 publications

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“…Besides the ESI-07 assessment performed in this study, we retrieved information on earthquake damage from PHIVOLCS reports and online questionnaires. PHIVOLC reports include maps expressed in terms of PEIS (PHIVOLC Earthquake Intensity Scale), the macroseismic scale adopted in the Philippines since 1996 (Lasala et al 2015). PEIS intensity is structured in ten degrees, so it differs from other scales which usually have twelve degrees.…”

Section: Comparison With Other Macroseismic Datamentioning

confidence: 99%

“…PEIS intensity is structured in ten degrees, so it differs from other scales which usually have twelve degrees. Damage to buildings starts to appear at PEIS intensity VI; at intensity VII, liquefaction, landslides and damage even to well-built structures are common (Lasala et al, 2015).…”

Section: Comparison With Other Macroseismic Datamentioning

confidence: 99%

“…For this reason, comparison among scales should be taken with caution, bearing in mind the fundamental differences among them. For a qualitative comparison, we rely on conversion tables among PEIS and MM intensities provided by Besana et al (1997) and Lasala et al (2015).…”

Section: Comparison Among Intensity Measuresmentioning

confidence: 99%

“…; right-hand panel show ESI-07 isoseismals (this study) and CDI values retrieved from USGS. A conversion table between intensity scales is provided as well (afterLasala et al, 2015) Comparison of the intensity values obtained using different scales, namely the PEIS, MM, CDI and…”

mentioning

confidence: 99%

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Environmental effects following a seismic sequence: the 2019 Cotabato - Davao del Sur (Philippines) earthquakes

Ferrario

Perez

Dizon

et al. 2023

Preprint

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In the period of October – December 2019, the Cotabato – Davao del Sur region (Philippines) was hit by a seismic sequence comprising four earthquakes with magnitude MW > 6.0 (EQ1-4; max magnitude MW 6.8). The earthquakes triggered widespread environmental effects, including landslides and liquefaction features. We documented such effects by means of field surveys, which we supplemented with landslide mapping from satellite images. Field surveys allowed us to gather information on 43 points after EQ1, 202 points after EQs2-3 and 87 points after EQ4. Additionally, we built a multi-temporal inventory of landslides from remote sensing, comprising 190 slope movements triggered by EQ1, 4737 after EQs2-3, and 5666 at the end of the sequence. We assigned an intensity value to each environmental effect using the Environmental Seismic Intensity (ESI-07) scale. Our preferred estimates of ESI-07 epicentral intensity are VIII for the first earthquake and IX at the end of the sequence, which is in broad agreement with other events of similar magnitude globally. This study, which is the first case of the application of the ESI-07 scale to a seismic sequence in the Philippines, shows that repeated documentation of environmental damage and the evaluation of the progression through time may be useful for time-dependent susceptibility assessment and for investigating the role played by ground shaking and by other mechanisms (e.g., rainfall).

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Section: Comparison With Other Macroseismic Datamentioning

confidence: 99%

Section: Comparison With Other Macroseismic Datamentioning

confidence: 99%

Section: Comparison Among Intensity Measuresmentioning

confidence: 99%

mentioning

confidence: 99%

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Environmental effects following a seismic sequence: the 2019 Cotabato - Davao del Sur (Philippines) earthquakes

Ferrario

Perez

Dizon

et al. 2023

Preprint

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“…Selanjutnya, untuk mengurangi error, maka sampling rate yang digunakan pada arduino menggunakan kecepatan standar 9600 bps. Intensity Meter akan bekerja lebih optimal dengan jaringan sistem telemetri yang baik (Lasala, 2015).…”

Section: Gambar 1 Cara Kerja Sistemunclassified

Modul Deteksi dan Perekaman Data Gempa berbasis Database Earthquake Intensity (DEI)

et al. 2021

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ABSTRAKIndonesia, khususnya provinsi Bengkulu, adalah salah satu negara yang rawan bencana gempa. Hal ini disebabkan karena secara histografi, posisi wilayah Indonesia merupakan pertemuan tiga lempeng aktif yang setiap kali lempeng ini bergeser menimbulkan patahan yang menyebabkan terjadinya gempa bumi. Paper ini membahas tentang rancangan modul deteksi gempa yang diberi nama Earthquake Intensity Meter. Rancangan modul terdiri dari sensor MEMS MPU6050 dan 2 buah sensor piezoelektrik. Masing-masing sensor dipisahkan dengan jarak 10 meter dengan sensor MPU6050 yang menjadi pusatnya dan 2 sensor piezoelektrik hanya sebagai pemicu. Kombinasi sensor MPU6050 dan 2 sensor piezoelektrik mampu digunakan untuk membedakan getaran gempa dan bukan gempa dengan tingkat keberhasilan 32%. Aplikasi Vibrometer yang digunakan sebagai media kalibrasi, memiliki selisih 17% dengan intensity meter. Sedangkan akurasi sensor MPU6050 dalam rancangan modul memiliki selisih 11,17% dengan aplikasi vibrometer. Data hasil pendeteksian rancangan divisualisasikan secara realtime dan disimpan pada aplikasi DEI yang dirancang dengan VB 2010.Kata kunci: deteksi gempa, mpu6050, piezoelektrik, vibrometer, VB 2010 ABSTRACTIndonesia, especially Bengkulu province, is one of the countries prone to earthquake disasters. This is because histographically, the position of the Indonesian territory is a junction of three active plates which each time these plates shift, causing fractures that cause earthquakes. This paper discusses the design of an earthquake detection module called the Earthquake Intensity Meter. The module design consists of a MEMS MPU6050 sensor and 2 piezoelectric sensors. Each sensor is separated by a distance of 10 meters with the MPU6050 sensor at the center and 2 piezoelectric sensors only as a trigger. The combination of the MPU6050 sensor and 2 piezoelectric sensors can be used to distinguish between earthquake and non-earthquake vibrations with a 32% success rate. The Vibrometer application, which is used as a calibration medium, has a difference of 17% with an intensity meter. Meanwhile, the accuracy of the MPU6050 sensor in the module design has a difference of 11,17% with the vibrometer application. Data from design detection results is visualized in real time and stored in the DEI application designed with VB 2010.Keywords: earthquake detector, mpu6050, piezoelectric, vibrometer, VB 2010

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Environmental effects following a seismic sequence: the 2019 Cotabato—Davao del Sur (Philippines) earthquakes

Ferrario,

Perez,

Dizon

et al. 2024

Nat Hazards

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In the period of October–December 2019, the Cotabato–Davao del Sur region (Philippines) was hit by a seismic sequence comprising four earthquakes with magnitude MW > 6.0 (EQ1-4; max magnitude MW 6.8). The earthquakes triggered widespread environmental effects, including landslides and liquefaction features. We documented such effects by means of field surveys, which we supplemented with landslide mapping from satellite images. Field surveys allowed us to gather information on 43 points after EQ1, 202 points after EQs2–3 and 87 points after EQ4. Additionally, we built a multi-temporal inventory of landslides from remote sensing, comprising 190 slope movements triggered by EQ1, 4737 after EQs2–3, and 5666 at the end of the sequence. We assigned an intensity value to each environmental effect using the environmental seismic intensity (ESI-07) scale. Our preferred estimates of ESI-07 epicentral intensity are VIII for the first earthquake and IX at the end of the sequence, which is in broad agreement with other events of similar magnitude globally. This study, which is the first case of the application of the ESI-07 scale to a seismic sequence in the Philippines, shows that repeated documentation of environmental damage and the evaluation of the progression through time may be useful for providing input data for derivative products, such as susceptibility assessment, evaluation of residual risk or investigation of the role played by ground shaking and by other mechanisms able to trigger environmental effects.

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Establishment of Earthquake Intensity Meter Network in the Philippines

Cited by 8 publications

References 3 publications

Environmental effects following a seismic sequence: the 2019 Cotabato - Davao del Sur (Philippines) earthquakes

Environmental effects following a seismic sequence: the 2019 Cotabato - Davao del Sur (Philippines) earthquakes

Modul Deteksi dan Perekaman Data Gempa berbasis Database Earthquake Intensity (DEI)

Environmental effects following a seismic sequence: the 2019 Cotabato—Davao del Sur (Philippines) earthquakes

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