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MEMS Accelerometer Mini-Array (MAMA); a low-cost implementation for earthquake early warning enhancement

Ran N. Nof, Angela I. Chung, Horst Rademacher, Lori Dengler and Richard M. Allen
MEMS Accelerometer Mini-Array (MAMA); a low-cost implementation for earthquake early warning enhancement
Earthquake Spectra (February 2019) 35 (1): 21-38

Abstract

Earthquake Early Warning Systems (EEWS) are often challenged when the earthquakes occur outside the seismic network or where the station density is sparse. In these situations, poor locations and large alert delays are more common because of the limited azimuthal coverage and the time required for the wavefield to reach the minimum number of seismic stations to issue an alert. Seismic arrays can be used to derive the directivity of the wavefield and obtain better location. However, they are uncommon because of the prohibitive cost of the sensors. Here, we propose the development of an array-based approach using mini-arrays of low-cost Microelectromechanical Systems (MEMS) accelerometers and show how they can be used to improve EEWS. In this paper, we demonstrate this approach using data from two MEMS Accelerometer Mini-Arrays (MAMA) deployed at University of California Berkeley and Humboldt State University. We use a new low-cost (<U.S. $150) Data Acquisition Unit and solve for the back azimuth of seven events with magnitudes ranging from Mw 2.7 to 5.1 at distances of 5 km to 106 km.


ISSN: 8755-2930
EISSN: 1944-8201
Serial Title: Earthquake Spectra
Serial Volume: 35
Serial Issue: 1
Title: MEMS Accelerometer Mini-Array (MAMA); a low-cost implementation for earthquake early warning enhancement
Affiliation: University of California at Berkeley, Berkeley Seismology Laboratory, Berkeley, CA, United States
Pages: 21-38
Published: 201902
Text Language: English
Publisher: Earthquake Engineering Research Institute, Berkeley, CA, United States
References: 48
Accession Number: 2021-009907
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch maps
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Secondary Affiliation: Humboldt State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202103
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