Global & Disaster Medicine

Archive for the ‘Earthquake’ Category

What does a 7.2M earthquake look like in Valparaiso, Chile?


USGS said the quake hit at 10:57 a.m. local time and was centered 40 miles west-southwest of the city of Constitucion and about 225 miles south of Santiago, the capital. The epicenter was 10.3 miles below the surface.

Estimated Fatalities

Estimated Fatalities Histogram
Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Estimated Economic Losses

Estimated Economic Losses Histogram

Estimated Population Exposure to Earthquake Shaking

Population Exposure Map
Population per ~1 sq. km. from LandScan

Structure Information Summary

Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are adobe block and rubble/field stone masonry construction.

Secondary Effects

Recent earthquakes in this area have caused secondary hazards such as liquefaction that might have contributed to losses.


A powerful magnitude 6.8 earthquake shook the coast of Chile on Sunday, swaying buildings in the capital of Santiago. The national emergency agency said there were no reported injuries or damage to basic services.

DYFI intensity map


At least 37 people were injured on Saturday when a 5.6-magnitude earthquake struck Albania’s central coast near the port city of Durrës

DYFI intensity map

Estimated Fatalities

Estimated Fatalities Histogram
Yellow alert for shaking-related fatalities and economic losses. Some casualties and damage are possible and the impact should be relatively localized. Past yellow alerts have required a local or regional level response.

Estimated Economic Losses

Estimated Economic Losses Histogram
Estimated economic losses are less than 1% of GDP of Albania.


September 21, 1999: An earthquake in Taiwan kills thousands of people, causes billions of dollars in damages and leaves an estimated 100,000 homeless.

HxC


The August 29, 2019, M 6.3 earthquake near the coast of Oregon occurred as the result of strike-slip faulting along the Blanco Fracture Zone

DYFI intensity map

Tectonic Summary

The August 29, 2019, M 6.3 earthquake near the coast of Oregon occurred as the result of strike-slip faulting along the Blanco Fracture Zone, a transform fault marking the boundary between the Pacific Plate to the southwest and the Juan de Fuca Plate to the northeast. Moment tensor solutions show faulting occurred as a result of slip on a steeply dipping fault, either from left-lateral slip on a northeast striking fault or right-lateral slip on a southeast striking fault. Given the moment tensor and orientation of the fracture zone, this event occurred on a steeply dipping, right-lateral, southeast striking fault. At this location, the Juan de Fuca Plate slides past the Pacific Plate at a rate of 49 mm a year along an azimuth of 110 degrees from north. The Juan de Fuca plate ultimately subducts beneath North America along the Cascadia subduction zone about 200 km to the east of today’s event; hence, this earthquake did not occur on the subduction zone, but rather is the result of Pacific:Juan de Fuca plate boundary interactions farther west.

The Pacific-Juan de Fuca Plate boundary offshore of northern California, Oregon, and Washington routinely host moderate size earthquakes. Within 250 km of the August 29th event, there were 21 other earthquakes of magnitude 6 and larger over the preceding 100 years. The largest of these was an M 6.9 earthquake that occurred on July 13th, 1991 that was felt throughout much of western Oregon and northern California. The 1991 event ruptured southeast of the Blanco Fracture Zone, within the Juan de Fuca Plate closer to the coasts of Oregon and northern California. One year prior to this August 29, 2019 earthquake, a similar earthquake in size, location, and mechanism, occurred on August 22, 2019 and was felt along the Oregon coast.

Estimated Fatalities Histogram

Estimated Economic Losses Histogram


7/28/1976: At 3:42 a.m., an earthquake measuring between 7.8 and 8.2 magnitude on the Richter scale flattens Tangshan, China killing an estimated 242,000 people.

HxC


Eight people were killed after back-to-back earthquakes (5.9M/4.5M) struck the northern Philippines Saturday

CBS

Magnitude Mw 5.7
Region BATAN ISL REGION, PHILIPPINES
Date time 2019-07-27 01:24:43.4 UTC
Location 20.77 N ; 122.09 E
Depth 2 km
Distances 275 km SE of Kaohsiung, Taiwan, Province of China / pop: 1,520,000 / local time: 09:24:43.4 2019-07-27
195 km SE of Hengchun, Taiwan, Province of China / pop: 31,300 / local time: 09:24:43.4 2019-07-27
Global view


The 7/19/19 earthquake in Greece

ECDM_20190723_Greece_EQ.png


7/21/365: a powerful earthquake off the coast of Greece causes a tsunami that devastates the city of Alexandria, Egypt and the surrounding area killing 50000, destroying 50,000 buildings, and poisoning the fertile land with salt water for decades.

HxC


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