Coronavirus Information for the UC San Diego Community

Our leaders are working closely with federal and state officials to ensure your ongoing safety at the university. Stay up to date with the latest developments. Learn more.

Rupture speed dependence on initial stress profiles: Insights from glacier and laboratory stick-slip

TitleRupture speed dependence on initial stress profiles: Insights from glacier and laboratory stick-slip
Publication TypeJournal Article
Year of Publication2015
AuthorsWalter J.I, Svetlizky I., Fineberg J., Brodsky E.E, Tulaczyk S., Barcheck C.G, Carter S.P
JournalEarth and Planetary Science Letters
Date Published2015/02
Type of ArticleArticle
ISBN Number0012-821X
Accession NumberWOS:000349197500012
Keywordsantarctica; dynamics; earthquake physics; earthquakes; frictional stick-slip; ice sheet motion; ice stream; ice streams; motion; Onset; ross sea; slow slip

Slow slip events are now well-established in fault and glacier systems, though the processes controlling slow rupture remain poorly understood. The Whillans Ice Plain provides a window into these processes through bi-daily stick-slip seismic events that displace an ice mass over 100 km long with a variety of rupture speeds observed at a single location. We compare the glacier events with laboratory experiments that have analogous loading conditions. Both systems exhibit average rupture velocities that increase systematically with the pre-rupture stresses, with local rupture velocities exhibiting large variability that correlates well with local interfacial stresses. The slip events in both cases are not time-predictable, but clearly slip-predictable. Local pre-stress may control rupture behavior in a range of frictional failure events, including earthquakes. (C) 2014 The Authors. Published by Elsevier B.V.

Short TitleEarth Planet. Sci. Lett.
Student Publication: