Does Aberdeen, MD need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Aberdeen is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Aberdeen in the 53th percentile nationally for seismic hazard - higher than 53% of the 4,875 US cities USGS was checked against here.

Where Aberdeen sits in Maryland

The raw figures: peak ground acceleration 0.089g, short-period spectral response 0.162g, 1-second spectral response 0.045g. Among 46 Maryland cities in this dataset, Aberdeen ranks 3 for seismic hazard, the 96th percentile within the state. About 18,451 people live in Aberdeen, Maryland.

Retrofit economics for Aberdeen

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Maryland. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Aberdeen home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Aberdeen address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Aberdeen's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.