= Solution
\b[For a Seattle resident, the main consequences are <earthquake> shaking and disruption, strongly modified by local ground conditions, plus location-dependent <tsunami>, <landslide> and volcanic hazards.]
Three <earthquake> sources matter: the offshore <Cascadia> <megathrust>, deep events inside the <Juan de Fuca Plate>, and shallow upper-plate <faults>, including the <Seattle Fault>. Shaking can damage buildings, bridges, ports and utility networks, interrupting transport, electricity and water supply. Soft basin <sediments> can amplify or prolong shaking; saturated loose fill can undergo <soil liquefaction> and lateral spreading. Steep slopes can fail as <landslides>. The same regional event can therefore have very different consequences on bedrock and on artificial fill.<Pacific Northwest Hazards by United States Geological Survey>{ref}
Large <Cascadia> <tsunamis> chiefly threaten the outer Pacific coast. Seattle's inland waterways also have local <tsunami> hazards from crustal <faults> and underwater <landslides>; one should not equate a Seattle waterfront site with an open-ocean coastal site. Cascade eruptions can affect the region through <volcanic ash> and transport disruption. <Lahars> are strongly channelled by river valleys, so their exposure is location dependent rather than uniform across Seattle. These geological differences influence infrastructure design, land-use decisions and emergency planning.https://www.dnr.wa.gov/programs-and-services/geology/geologic-hazards/earthquakes-and-faults[Washington Geological Survey, earthquake and fault mechanisms]{ref}https://cmgds.marine.usgs.gov/data/geotech/pugetposter/geologic.html[USGS, Puget Sound deltas, historic liquefaction damage and the Seattle Fault]{ref}
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