<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>R. D. Borcherdt</dc:contributor>
  <dc:creator>G. Glassmoyer</dc:creator>
  <dc:date>1990</dc:date>
  <dc:description>&lt;p&gt;A 10-station array (GEOS) yielded recordings of exceptional bandwidth (400 sps) and resolution (up to 96 dB) for the aftershocks of the moderate (&lt;i&gt;m&lt;sub&gt;b&lt;/sub&gt;&lt;/i&gt;&amp;nbsp;≈ 4.9) earthquake that occurred on 31 January 1986 near Painesville, Ohio. Nine aftershocks were recorded with seismic moments ranging between 9 × 10&lt;sup&gt;16&lt;/sup&gt;&amp;nbsp;and 3 × 10&lt;sup&gt;19&lt;/sup&gt;&amp;nbsp;dyne-cm (&lt;i&gt;M&lt;sub&gt;w&lt;/sub&gt;&lt;/i&gt;: 0.6 to 2.3). The two largest aftershocks (depth 5.3, 5.6 km; oblique right slip, rake ≈30°, strike ≈N25°E) yielded seismic signals above background noise at frequencies as high as 130 Hz at epicentral distances up to 17 km. The aftershock recordings at a site underlain by ≈8 m of lakeshore sediments show significant levels of high-frequency soil amplification of vertical motion at frequencies near 8, 20, and 70 Hz. Viscoelastic models for&amp;nbsp;&lt;i&gt;P&lt;/i&gt;&amp;nbsp;and&amp;nbsp;&lt;i&gt;SV&lt;/i&gt;&amp;nbsp;waves incident at the base of the sediments yield estimates of vertical&amp;nbsp;&lt;i&gt;P&lt;/i&gt;-wave response consistent with the observed high-frequency site resonances, but suggest additional detailed shear-wave logs are needed to account for observed&amp;nbsp;&lt;i&gt;S&lt;/i&gt;-wave response. Peak acceleration values obtained from the broadband recordings are about two and four times as large as those that would be recorded on strong-motion recorders or short-period networks with upper bandwidth limits of 30 and 15 Hz, respectively. Attenuation-corrected acceleration spectra are used to reduce the influence of high-frequency (up to 100 Hz) local site effects on corner frequency estimates. The moment versus source radius trend inferred for events with moments as small as 9 × 10&lt;sup&gt;16&lt;/sup&gt;&amp;nbsp;dyne-cm, based on the Brune source model, extends previous relations inferred for the central United States, shows little evidence for a minimum source radius, and suggests that stress drops for the smaller events (&lt;i&gt;M&lt;/i&gt;&lt;sub&gt;0&lt;/sub&gt;&amp;nbsp;&amp;lt; 10&lt;sup&gt;19&lt;/sup&gt;&amp;nbsp;dyne-cm) decrease with decreasing moment.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1785/BSSA0800040889</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Seismological Society of America</dc:publisher>
  <dc:title>Source parameters and effects of bandwidth and local geology on high- frequency ground motions observed for aftershocks of the northeastern Ohio earthquake of 31 January 1986</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>