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Seaside Hotel

The hotel chain you work for wants to build a high-rise hotel in the town of Seaside, Oregon. They ask you to visit the town and find a good site for the hotel. The President of the company is excited about having a hotel right next to the beach. But you¥ taken an Oceanography class and suspect that there might be a Tsunami hazard. You decide to study a geologic map of the Oregon Coast.

Study the map of the Oregon CoastLinks to an external site. showing topography and bathymetry:

https://digital.osl.state.or.us/islandora/object/osl%3A891/datastream/OBJ/viewLinks to an external site.

The beach town of Seaside is on the upper part of the map, just below the Columbia River and to the left of ìatsop/em>.

Flag question: Question 1Question 14 pts

Group of answer choicesMost tsunamis are caused by 

[ Choose ] Get taller and slow down Have a long wavelength and low height Large undersea earthquakes The wind 

Regular ocean waves get their energy from

[ Choose ] Get taller and slow down Have a long wavelength and low height Large undersea earthquakes The wind 

In the open ocean, Tsunami waves

[ Choose ] Get taller and slow down Have a long wavelength and low height Large undersea earthquakes The wind 

As waves approach the shore they

[ Choose ] Get taller and slow down Have a long wavelength and low height Large undersea earthquakes The wind 

Flag question: Question 2Question 21 pts

If the trough of a Tsunami wave reaches the shore first:

Group of answer choicesYou should immediately evacuate the beach

The water on the beach will withdraw farther than usual

The crest of the wave will come next

All of these

Flag question: Question 3Question 31 pts

The Indian Ocean Tsunami of 2004 was caused by a:

Group of answer choicesLandslide

Megathrust Earthquake

Tidal Forces

Volcanic Eruption

Flag question: Question 4Question 41 pts

Reasons why the Indian Ocean Tsunami was so deadly:

Group of answer choicesTsunamis do not travel very far across the ocean

The Tsunami waves moved slowly and did not reach shore for an hour

First waves hit within 20 minutes and there were no warning systems

The megathrust earthquake was on land and there were no warning systems

Flag question: Question 5Question 51 pts

The Cascadia Subduction Zone:

Group of answer choicesIs not part of the Ring of Fire

Runs from the northern part of Japan down to Australia

Runs from Northern California to British Columbia, Canada

Is in the Indian Ocean near Sumatra

Flag question: Question 6Question 61 pts

Why a pressure recorder anchored to the seafloor can detect a passing Tsunami:

Group of answer choicesThe direct relationship between an earthquake and height of water column above

The direct relationship between pressure and height of water column above

The Tsunami warning Center sends a signal to the pressure recorder

The Surface Buoy sends an acoustic transmission to the pressure recorder

Flag question: Question 7Question 71 pts

Ways to be prepared for an earthquake:

Group of answer choicesHave emergency food and water

Bolt home to foundation

All of these

Attach heavy objects in a home to the wall

Flag question: Question 8Question 81 pts

The following questions are for the Seaside Oregon map.

Scroll up and down the map. In the ocean, notice the red line with triangles, running parallel to the coast. What does this line represent? Hint: check Legend at bottom of map.

Group of answer choicesSubduction Zone

Beach

Transform Fault

Mid-Ocean Ridge

Flag question: Question 9Question 91 pts

What are the names of the two tectonic plates on either side of this line? (On either side of the red line with triangles in the ocean) Hint: scroll to the part of the map that says ‘Pacific Ocean’.

Group of answer choicesJuan de Fuca and North American

North American and Eurasian

Pacific and North American

North American and South American

Flag question: Question 10Question 101 pts

In terms of elevation, which color on the map represents Land that is above 100 ft? (safe from a tsunami). Hint: see Legend at bottom of map.

Group of answer choicesGrey

Orange

Blue

Red

Flag question: Question 11Question 111 pts

Scroll to the near the bottom of the map. Find the beach town of Crescent City, California.

Crescent City is:

Group of answer choicesNot near the Cascadia Subduction zone and so safe from a tsunami

In the tsunami danger zone because it is above 100 ft elevation

Too far inland to be hit by a tsunami

In the tsunami danger zone because it is below 100 ft elevation

Flag question: Question 12Question 121 pts

An earthquake along the Cascadia Subduction ZoneLinks to an external site. could cause a tsunami wave up to 100 ft high. Based on this information and your study of the map, where would be a safer place in Seaside to build a hotel?

Group of answer choicesIn Crescent City, CA, instead

Right on the beach

Next to the river in Seaside

Inland, in the hills behind the town