RT Journal Article SR Electronic T1 Note on earthquake intensity in San Francisco JF American Journal of Science JO Am J Sci FD American Journal of Science SP 427 OP 431 DO 10.2475/ajs.s3-35.210.427 VO s3-35 IS 210 A1 Edward Singleton Holden YR 1888 UL http://www.ajsonline.org/content/s3-35/210/427.abstract AB