Earthquakes Across the U.S.: Alaska, Hawaii and Washington, D.C.

(July 19) -- UPDATE: A 5.1 magnitude earthquake struck 300 miles west of Vancouver Island, British Columbia, today at 1:15 p.m. EDT. There are no reports of injuries or damages and a tsunami warning was not issued.

A spate of relatively mild earthquakes has struck the United States recently, including a 4.5-magnitude earthquake in Alaska's Aleutian Islands this morning. Below is a look back at the past four days in earthquakes.

1. July 19, Vancouver Island, British Columbia, Canada
Magnitude: 5.1
Time: 1:15 p.m. EDT
Notes: There are no initial reports of injuries or damages. A tsunami warning was not issued.

2. July 19, Aleutian Islands, Alaska
Magnitude: 4.5
Time: 7:46 a.m. EDT
Notes: The United States Geological Survey is reporting that the quake occurred this morning in the Fox Islands. It may be one in a series of nearly two dozen aftershocks from Saturday's 6.7 earthquake there.

3. July 18, Oahu, Hawaii
Magnitude: 3.5
Time: 9:27 p.m. EDT
Notes: No injuries or damaged property reported. No tsunami warnings. The last earthquake in the area was in 2002.

4. July 18, Big Island, Hawaii
Magnitude: 2.4
Time: 5:16 p.m. EDT
Notes: No injuries or damaged property reported. No tsunami warnings.

5. July 18, Big Island, Hawaii
Magnitude: 2.9
Time: 1:34 p.m. EDT
Notes: No injuries or damaged property reported. No tsunami warnings.

6. July 18, Aleutian Islands, Alaska
Magnitude: 6.7
Time: 1:56 a.m. EDT
Notes: The earthquake set off nearly two dozen aftershocks in the area over the weekend. Alaska and the Aleutian Islands experience more earthquakes than all other 49 states combined, according to the USGS.

7. July 16, Rockville, Md.
Magnitude: 3.6
Time: 5:04 a.m. EDT
Notes: The quake didn't cause any damage but startled residents all the way to southeastern Pennsylvania. It was the strongest temblor felt in the Washington, D.C., area since 1974.