Five minor to moderately strong earthquakes were registered at Mendocino Triple Junction, west of Eureka, California at a depth of 10 km (6.2 miles) on May 5, 2019.
The strongest was M4.8 detected at 06:46 UTC on May 5.
The sequence started with M3.1 at 04:17 UTC, followed by M3.3 at 06:29, M4.3 at 06:32, M4.8 at 06:46, and ended at 07:12 UTC with M3.2.
Earthquakes such as these are a common occurrence in this area.
This is a juncture of three plates, the Gorda plate, the North American plate, and the Pacific plate, creating what seismologists call Mendocino Triple Junction (MTJ).
West Coast earthquakes detected on May 5, 2019. Credit: Google, TW/SAM. Data source: USGS
MTJ is the location of a change in the broad plate motions which dominate the west coast of North America, linking convergence of the northern Cascadia subduction zone and translation of the southern San Andreas Fault system.
The Gorda plate is subducting, towards N50ºE, under the North American plate at 2.5 – 3 cm per year (1 - 1.2 inches), and is simultaneously converging obliquely against the Pacific plate at a rate of 5 cm per year (1.9 inches) in the direction N115ºE.
The accommodation of this plate configuration results in a transform boundary along the Mendocino Fracture Zone, and a divergent boundary at the Gorda Ridge.
Featured image credit: Google, TW/SAM
April 01, 2020
Heavy downpours affecting Syria's Raqqa governorate since March 25, 2020, caused damaging floods and mudslides, killing at least seven people. The Civil Council of Raqqa, which is affiliated with the Kurdish Autonomous Administration of North and East Syria...
April 01, 2020
Heavy rains since March 28, 2020, have been hitting the department of Huanuco in central Peru, leading to flooding and landslides. The severe weather disrupted lives in the area, partially or totally damaging hundreds of properties. According to the country's...
March 31, 2020
Sandstorms blanketed parts of the Middle East on Saturday, March 28, 2020. The countries affected included Qatar, Kuwait, and Saudi Arabia. Skies turned orange as dust storms engulfed the Middle Eastern countries. In the footage, motorists were seen braving the...
Continuous heavy rains, floods and landslides claim 72 lives, destroy or damage nearly 1 000 buildings in Khyber Pakhtunkhwa, Pakistan
March 29, 2020
Heavy rains, floods and landslides affecting Khyber Pakhtunkhwa, Pakistan since March 6, 2020, claimed the lives of 72 people, destroyed at least 139 buildings, and damaged at least 800 more. Earlier this month, heavy downpours resulted in deaths of 27 people while...
March 18, 2020
A strong and shallow earthquake registered by the USGS as M6.3 hit south of Bali, Indonesia at 17:45 UTC on March 18, 2020 (01:45 LT, March 19). The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting the same magnitude and depth. The epicenter was...