Mason County

Earthquake Risk

Kitsap

Pierc e

Th u rston

Olympia structure

Lucky Dog fault

Tacoma fault

Canyon River fault

Seattle fault zone

Saddle Mountain faults

Saddle Mountain faults

Olympia structure

Hood

Canal

fault z

one

Frigid Creek fault

Allyn

Belfair

Grapeview

Hoodsport

Lilliwaup

Potlatch

Shelton

Union

ScenarioEQ Epicenter

(47.41, -123.31)

Canyon River (Price Lake) M7.4 Scenario

Th is m ap depic ts th e peak g rou nd ac c eleration (in % g rav ity) for a M 7.4 earth q u ake loc ated on th eCanyon Riv er - Saddle M ou ntain fau lt zone. Th e resu lting Sh akeM ap data was produ c ed b y th e U.S. Geolog ic al Su rv ey (USGS) and sh ow s th e potential im pac t in term s of sh aking and resu lting dam ag efrom an earth q u ake of th is m ag nitu de. Sc enario Sh akeM aps are produ c ed b y th e USGS for m itig ationand em erg enc y planning pu rposes.Data Sou rc e: U.S. Geolog ic al Su rv ey (USGS), Sh akeM ap Arc h iv e, Canyon Riv er (Pric e Lake) M 7.4 Sc enario; Ju ne 4, 2009

PerceivedShakingPotentialDamage

PeakAcceleration(% gravity)

InstrumentalIntensity

Light Moderate Strong Very Strong Severe/Violent

None Very Light Light Moderate Moderate/Heavy

2% - 4% 5% - 9% 10% - 18%19% - 34% 35% - 70%

<15,000 years<130,000 years<750,000 years<1,600,000 yearsUnknow n Ag e

Age of Earthquake Fault

Kitsap

Pierc e

Th u rston

GraysHarb or

Olympia structure

Lucky Dog fault

Tacoma fault

Canyon River fault

Seattle fault zone

Saddle Mountain faults

Saddle Mountain faults

Olympia structure

Hood

Canal

fault z

one

Frigid Creek fault

Allyn

Belfair

Grapeview

Hoodsport

Lilliwaup

Potlatch

Shelton

Union

(47.15, -122.73)

ScenarioEQ Epicenter

Date: Ju ly 9, 2017Sou rc es: M ason Cou nty GIS;USGS Sh akeM ap Arc h iv e

Nisqually Fault M7.2 Scenario

PerceivedShakingPotentialDamage

PeakAcceleration(% gravity)

InstrumentalIntensity

Light Moderate Strong Very Strong Severe/Violent

None Very Light Light Moderate Moderate/Heavy

2% - 4% 5% - 9% 10% - 18%19% - 34% 35% - 70%

<15,000 years<130,000 years<750,000 years<1,600,000 yearsUnknow n Ag e

Age of Earthquake Fault

Th is m ap depic ts th e peak g rou nd ac c eleration (in % g rav ity) for a M 7.2 earth q u ake loc ated on th eNisq u ally Fau lt. Th e resu lting Sh akeM ap data was produ c ed b y th e U.S. Geolog ic al Su rv ey (USGS) andsh ow s th e potential im pac t in term s of sh aking and resu lting dam ag e from an earth q u ake of th ism ag nitu de. Sc enario Sh akeM aps are produ c ed b y th e USGS for m itig ation and em erg enc y planningp u rposes.Data Sou rc e: U.S. Geolog ic al Su rv ey (USGS), Sh akeM ap Arc h iv e, Nisqu ally Fau lt M 7.2 Sc enario; M ay 14, 2009

USGS ShakeMap Earthquake ScenariosA sc enario represents one realization of a potential fu tu re earth q u ake b y assu m ing a partic u lar m ag nitu de, loc ation,and fau lt-ru ptu re g eom etry and estim ating sh aking u sing a v ariety of strateg ies.

In planning and c oordinating em erg enc y response, u tilities, loc al g ov ernm ent, and oth er org anizations are b est serv edb y c ondu c ting training exerc ises b ased on realistic earth q u ake situ ations—ones sim ilar to th ose th ey are m ost likely tofac e. Sh akeM ap Sc enario earth q u akes c an fill th is role. Th ey c an also b e u sed to exam ine exposu re of stru c tu res, lifelines,u tilities, and transportation c orridors to spec ified potential earth q u akes.

A Sh akeM ap earth q u ake sc enario is a predic tiv e Sh akeM ap with an assu m ed m ag nitu de and loc ation, and, optionally,spec ified fau lt g eom etry.

2014 U.S. Geological Survey (USGS)National Seismic Hazard Map

2% Probability of Exceedance in 50 Years of Peak Ground Acceleration (PGA) (Simplified)