Marietta-Alderwood, WA Natural Disasters and Weather Extremes
The chance of earthquake damage in Marietta-Alderwood is much lower than Washington average and is higher than the national average. The risk of tornado damage in Marietta-Alderwood is about the same as Washington average and is much lower than the national average.
Earthquake Index, #277
| Marietta-Alderwood, WA | 2.17 |
| Washington | 4.04 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #190
| Marietta-Alderwood, WA | 0.0109 |
| Washington | 0.0135 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #655
| Marietta-Alderwood, WA | 1.82 |
| Washington | 9.06 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 31 other weather extremes events within 50 miles of Marietta-Alderwood, WA were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 0 | Cold: | 0 | Dense Fog: | 0 | Drought: | 0 |
| Dust Storm: | 0 | Flood: | 8 | Hail: | 0 | Heat: | 0 | Heavy Snow: | 2 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 5 |
| Thunderstorm Winds: | 3 | Tropical Storm: | 0 | Wildfire: | 0 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 13 | ||||||||
Volcanos Nearby
A total of 4 volcanoes are found in or near Marietta-Alderwood, WA.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 33.4 | Baker | US-Washington, United States | 48.786 | -121.82 | 3285 | Stratovolcano | Historical | Last known eruption 1800-1899 |
| 76.0 | Garibaldi, Mt. | Canada, Canada | 49.85 | -123 | 2678 | Stratovolcano | Radiocarbon | Last known eruption B.C. (Holocene) |
| 80.9 | Glacier Peak | US-Washington, United States | 48.112 | -121.113 | 3213 | Stratovolcano | Tephrochronology | Last known eruption 1700-1799 |
| 81.0 | Garibaldi Lake | Canada, Canada | 49.92 | -123.03 | 2316 | Volcanic field | Holocene | Undated, but probable Holocene eruption |
Historical Earthquake Events
A total of 14 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Marietta-Alderwood, WA.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 36.6 | 1976-05-16 | 5.1 | 62 | 48.8 | -123.36 |
| 8.1 | 1964-07-14 | 5 | N/A | 48.9 | -122.5 |
| 24.7 | 1969-02-14 | 4.5 | N/A | 48.73 | -123.09 |
| 25.1 | 1969-02-14 | 4.5 | N/A | 48.73 | -123.1 |
| 48.8 | 1967-05-25 | 4.5 | N/A | 48.1 | -122.8 |
| 40.8 | 1978-08-23 | 4.4 | 17 | 48.38 | -123.2 |
| 18.5 | 1977-07-10 | 4.3 | 11 | 48.53 | -122.45 |
| 41.0 | 1976-09-02 | 4.3 | 24 | 48.21 | -122.76 |
| 18.4 | 1979-11-26 | 4.1 | 20 | 48.54 | -122.41 |
| 14.6 | 1970-05-18 | 4 | 11 | 48.6 | -122.7 |
| 42.3 | 1979-03-12 | 3.8 | 24 | 48.19 | -122.76 |
| 47.8 | 1974-05-16 | 3.8 | 54 | 48.14 | -122.92 |
| 32.1 | 1976-01-31 | 3.6 | 18 | 48.35 | -122.32 |
| 32.6 | 1979-11-15 | 3.6 | 15 | 49.24 | -122.35 |
Historical Tornado Events
A total of 1 historical tornado event that had recorded magnitude of 2 or above found in or near Marietta-Alderwood, WA.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 45.7 | 1986-05-13 | 2 | 48°13'N / 122°03'W | 0.30 Mile | 33 Yards | 0 | 0 | 0K | 0 | Snohomish |
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.