Ring of Fire 2017

https://www.google.com/amp/s/www.vox.com/platform/amp/energy-and-environment/2017/9/21/16339522/8-things-to-know-about-earthquakes-mexico

Excerpt:
7) We have gotten better reducing earthquake risks and saving lives
About 90 percent of the world’s earthquakes occur in the Ring of Fire, the region around the Pacific Ocean running through places like the Philippines, Japan, Alaska, California, Mexico, and Chile. The ring is also home to three-quarters of all active volcanoes.

Mexico is an especially interesting case study. The country sits on top of three tectonic plates, making it seismically active. In 1985, an earthquake struck the capital, killing more than 10,000.

Denolle noted that the geology of the region makes it so that tremors from nearby areas are channeled toward Mexico City, making any seismic activity a threat.

The Mexican capital is built on the site of the ancient Aztec city of Tenochtitlan, an island in the middle of a lake. The dry lakebed that is now the foundation of the modern metropolis amplifies shaking from earthquakes.

The 1985 earthquake originated closer to the surface, and the seismic waves it produced had a relatively long time between peaks and valleys. This low-frequency vibration sends skyscrapers swaying, according to Denolle. “The recent earthquakes were deeper, so they had a higher frequency,” she said.

While the death toll has been lower so far than the 1985 earthquake, the risks from the recent temblor were different. “This particular earthquake appears to have effected shorter buildings,” McCabe said.

The biggest factor in preventing deaths from earthquakes are building codes. Designing buildings to move with the earth while remaining standing can save thousands of lives, but putting them into practice can be expensive and frequently becomes a political issue.

https://www.google.com/amp/www.dailymail.co.uk/sciencetech/article-4907738/amp/Where-earthquake-strike-California-edge.html

Excerpt:

Now, after a 6.1 magnitude earthquake hit New Zealand on Wednesday followed by temblors off the coasts of Japan (6.1), Vanuatu (6.4), and Indonesia (5.7) early Thursday morning, experts admit the Pacific is experiencing 'unusual' seismic activity, leaving the West Coast on edge.

Scroll down for video

http://www.cnn.com/2017/09/23/americas/mexico-oaxaca-earthquake/index.html
6.1 Oaxaca, Mexico

Excerpt:
(CNN)A 6.1 magnitude earthquake shook southern Mexico on Saturday morning, the US Geological Survey said, rattling a country still coming to grips with the devastation from two stronger temblors earlier this month.

Saturday's quake was centered in Oaxaca state, about 275 miles southeast of Mexico City. Roughly speaking, the epicenter was between the centers of this month's two more violent Mexico earthquakes -- the 7.1 magnitude temblor that hit Tuesday closer to the capital, and the 8.1 magnitude quake that struck September 8 off the country's southern Pacific coast, near Chiapas state.

https://www.google.com/amp/s/www.nbcnews.com/news/us-news/amp/mexico-earthquake-scares-californians-are-they-prepared-n803296

Excerpt:
LOS ANGELES — This week’s deadly earthquake in Mexico has many Californians asking: What will happen when the proverbial "big one" hits?

And their government is telling them two things: You will be on your own. And most of you are not ready.

Cities, counties and Gov. Jerry Brown’s Office of Emergency Services say a big quake will overwhelm police and fire crews and require citizens to take care of themselves for a week, maybe longer.


Is California Prepared for the 'Big One'?
Emergency management leaders hope that Californians will heed that message now, after weeks of news reports showing how volunteers became primary rescuers and relief workers, not only in Tuesday’s 7.1 magnitude quake south of Mexico City — and an earthquake further south earlier this month — but also in the hurricane disasters bedeviling the South and Caribbean.

Still, if the past is any guide, the vivid images from Mexico City may not be enough to persuade Californians to sock away food, water, flashlights and extra cash. Surveys have shown that less than half of Californians have done enough to make their homes safer in advance of a big earthquake.

Got a hinky feeling today, reading about Hawaii. The molten rock beneath Hawaii, as you know, has resulted in the formation of the islands. Hawaii is going off like hot cakes for three weeks, lava gushing, quakes rattling. The Marianas Islands, also in a particularly notable geological location, experienced an earthquake today, earthquake activity in Hawaii, and now small quakes in SF and about 200 miles N of SF.

Just noting movements.

Also today: 4.9 Guam. 4.5 Oaxaca. 4.6. Honshu

Local paper.

Anza earthquake felt in San Diego
May 26, 2018 KUSI Newsroom
SAN DIEGO (KUSI) – Another small earthquake in southern Riverside County could be felt in the San Diego region on Sunday.

Just before noon, a temblor with a preliminary magnitude of 3.1 struck about two miles northeast of Anza, not far from the San Diego County line. Reports on the U.S. Geological Survey website showed the quake could be felt in San Diego and Orange counties.

There were no immediate reports of damage.

It’s the eighth earthquake above magnitude 2.5 recorded in the Anza area in the past 30 days.

A magnitude 3.5 earthquake and a magnitude 3.2 earthquake both struck the same area last Saturday.

Multiple aftershocks — all below magnitude 1.0 — were recorded after the most recent quake.

Fabulous real-time map to track recent quakes.

http://seismo.berkeley.edu/seismo.real.time.map.html

https://www.sfgate.com/bayarea/amp/Arizona-mass-care-migration-California-earthquake-12931650.php?__twitter_impression=true

I’m not sure this has happened before.

Arizona prepares for mass exodus of Californians in event of catastrophic earthquake
Amy Graff | on May 21, 2018