Improved rapid magnitude estimation for a community-based, low-cost MEMS accelerometer network

Bulletin of the Seismological Society of America
By: , and 

Links

Abstract

Immediately following the Mw 7.2 Darfield, New Zealand, earthquake, over 180 Quake‐Catcher Network (QCN) low‐cost micro‐electro‐mechanical systems accelerometers were deployed in the Canterbury region. Using data recorded by this dense network from 2010 to 2013, we significantly improved the QCN rapid magnitude estimation relationship. The previous scaling relationship (Lawrence et al., 2014) did not accurately estimate the magnitudes of nearby (<35  km) events. The new scaling relationship estimates earthquake magnitudes within 1 magnitude unit of the GNS Science GeoNet earthquake catalog magnitudes for 99% of the events tested, within 0.5 magnitude units for 90% of the events, and within 0.25 magnitude units for 57% of the events. These magnitudes are reliably estimated within 3 s of the initial trigger recorded on at least seven stations. In this report, we present the methods used to calculate a new scaling relationship and demonstrate the accuracy of the revised magnitude estimates using a program that is able to retrospectively estimate event magnitudes using archived data.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Improved rapid magnitude estimation for a community-based, low-cost MEMS accelerometer network
Series title Bulletin of the Seismological Society of America
DOI 10.1785/0120140232
Volume 105
Issue 3
Year Published 2015
Language English
Publisher Seismological Society of America
Contributing office(s) Earthquake Science Center
Description 10 p.
First page 1314
Last page 1323
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table