Guide to Truss Bridges

The Historic American Engineering Record, a part of the National Park Service, produced a very detailed poster for identification of truss bridges. While these bridges aren’t as common in southern California, they still get plenty of use. Railroads are the most common user of these types of bridges, specifically the Pratt Truss.

City Heights – 1889

City Heights, an area of San Diego east of North Park in the central area of the city, is a very old and culturally diverse neighborhood. It was also known as the City of East San Diego before being incorporated into the City of San Diego and renamed City Heights in the mid 1910’s. In …

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University Heights – 1888

San Diego has changed quite a bit since it was first laid out in the late 1700’s. As the city grew, new neighborhoods were planned farther out from the city center. One of these, University Heights, is still around today by the same name albeit covering a smaller area. The original plan, from 1888, was …

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Seismographs Online

The California Integrated Seismic Network has an online feed showing seismographs throughout southern California.

http://www.scsn.org/index.php/earthquakes/live-seismogram-feed/index.html

Earthquake UPDATES – Mw 7.1 near Ridgecrest

Well, that was strong! I felt it here in San Diego. First time I felt my building sway and it shook for a while. USGS is now reporting the quake as a Mw 7.1, which is 11 times larger than the one yesterday. This, assuming a larger one doesn’t happen, has also been deemed the …

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