Map Sheet 48 (2025 update) - Site Condition

<div style='text-align:justify;'>This map shows distribution of the time-averaged shear-wave velocity in the upper 30 m (Vs30) for California. Vs30 is used as a proxy for local geologic site condition in ground motion hazard calculations. The map is produced using data provided by Thompson (ver. 2.0, July 2022), which is based on the method described by Thompson and others (2014) with adjustments (see Thompson, 2022 for detail). Vs30 unit is m/s. Data resolution is 3 arcseconds (approximately 90 m).</div><div style='text-align:justify;'><br /></div><div style='text-align:justify;'><i><font color='#b22222'>Due to software limitations, symbology cannot be added to this service. To match the symbology used in the </font><a href='https://maps.conservation.ca.gov/cgs/ms48/additionalmaps/' target='_blank'>MS48 Additional Maps application</a><font color='#b22222'>, use the following configuration: </font></i></div><div style='text-align:justify;'><div><ul><li><font color='#b22222'><i>Esri Color Ramp: Yellow to Dark Red</i></font></li><li><font color='#b22222'><i>Number of Classes: 5</i></font></li><li><font color='#b22222'><i>Classes &amp; Hex Codes:</i></font></li><li><font color='#b22222'><i>176.1 - 300: #F4FE93</i></font></li><li><font color='#b22222'><i>300 - 450: #F6DC6A</i></font></li><li><font color='#b22222'><i>450 - 600: #F2B841</i></font></li><li><font color='#b22222'><i>600 - 725: #BA671A</i></font></li><li><font color='#b22222'><i>725 - 1,473.3: #810A01</i></font></li></ul></div><div><br /></div></div>