2009 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory

Abstract

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Prevalence of Seismic Rate Anomalies Preceding Volcanic Eruptions in Alaska

“…In fact, many of the other non-eruptive anomalies (e.g., Augustine, 2007;Okmok, 2009) could also be considered post-eruptive unrest (Cameron et al, 2018). The Okmok, 2009 non-eruptive anomaly, for example, coincides with a thermal anomaly, tremor-like events, and shallow slope failure in late February to early March 2009, followed by tremor bursts in May 2009(McGimsey et al, 2014. Applying a post-eruptive window of 1-year eliminates 16% of these non-eruptive anomalies.…”

Evaluating the state-of-the-art in remote volcanic eruption characterization Part I: Raikoke volcano, Kuril Islands

“…The 1924 eruption generated tropospheric aerosol transport resulting in an ice-core signal in Greenland (Holdsworth and Peake, 1985;Lyons et al, 1990;Zielinski, 1995) but no significant aerosol peaks were observed in time series of atmospheric optical extinction (solar intensity; (Sato et al, 1993)). More recently, the Sakhalin Volcanic Eruptions Response Team (SVERT) reported weak fumarolic gas emissions and possible phreatic ash emissions at Raikoke in June 12-13, 2009 that did not lead to a major eruption (McGimsey et al, 2014). This activity coincided with the VEI 4 eruption of Sarychev Peak volcano, ~24 km to the south (Fig.…”

2011 volcanic activity in Alaska: summary of events and response of the Alaska Volcano Observatory

“…For more information on specific seismic network histories, readers are referred to the series of annual seismic summaries prepared by AVO (for example, Dixon and others, 2012) Table 3 summarizes changes in Aviation Color Codes in 2011 for Alaskan volcanoes. Table 4 presents cross-referenced lists of volcanic activity by year and by volcano for all previous reports (1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010).…”