Seismic risk… in Silicon Valley?


Hello, Bay Area. It is Tuesday September 27 and the morning fog is back. Here’s what you need to know to start your day.

A less-studied fault system along the west side of Silicon Valley could generate a magnitude 6.9 earthquake — the same size as the infamous 1989 Loma Prieta — every 250 to 300 years, according to a new study from Stanford.

The study adds to the understanding of the risk that the densely populated region of Silicon Valley may face due to the faults below, which are particularly difficult to study using traditional geological methods.

“The important message here is that we talk a lot about the San Andreas Fault and the Hayward Fault as being potentially dangerous, but we know there are many other faults beneath the San Francisco Bay Area that are capable to generate earthquakes,” said US Geological Survey geologist Stephen DeLong.

“The possibility of these moderate earthquakes every few hundred years is consistent with what we’ve previously thought about these faults,” DeLong said.

Read more from Claire Hao.

Today’s forecast

The morning fog has returned and is expected to spread into the San Ramon and Livermore valleys this morning before dissipating. Parts of San Francisco’s coast and west side can even feel like the height of foggy season.

High temperatures will range from the mid 60s along the coast to the low 80s in the hottest parts of East Bay. The maximum in downtown San Francisco is expected to be in the upper 60s.

Read the full forecast from newsroom meteorologist Gerry Díaz.

What to eat and drink

Spicy tonkotsu ramen from Momosan in San Jose.


Japanese celebrity chef Masaharu Morimoto of “Iron Chef” fame opened his long-awaited ramen restaurant in San Jose on Monday.

Momosan, at 378 Santana Row, offers nine varieties of ramen, including a rich tonkotsu, with a long-simmered pork bone broth; tsukemen, the Tokyo style dip; and a spicy vegan option, with miso broth and fried tofu.

But the 90-seat restaurant, which has an open kitchen and a large outdoor patio, serves much more than noodles. Morimoto has built its reputation and its large group of restaurants on the blend of Japanese and Western cuisines. Here, he offers options like duck fat fries with truffle ketchup, spicy tuna tacos with guacamole, and Peking duck with apricot chili sauce and pico de gallo. There is also a full bar.

Read more from Janelle Bitker.

• The Bay Area’s Best Korean Restaurants: These are the area’s most exciting Korean restaurants and BBQ hotspots.

• The Bay Area bakery is finally abandoning the controversial brand of mochi muffins.

• Celebrity chef’s new Peninsula restaurant ends in shock closure.

around the bay

Unite Here Local 2 union members and service workers picket SFO Terminal 3 as they begin their strike over wages and healthcare.

Unite Here Local 2 union members and service workers picket SFO Terminal 3 as they begin their strike over wages and healthcare.

Amy Osborne / Special for The Chronicle

Picket line at the airport: SFO food workers go on strike for higher pay.

From Heather Knight: More women in SF are coming forward with disturbing allegations about an alleged stalker.

Internal Audit: Alameda County Sheriff demotes 47 deputies, admitting they failed psychological exams and shouldn’t have been hired.

State action: Newsom signs bills to reduce catalytic converter thefts.

Difficult start: The chaotic crowds of SF’s first Portola festival draw comparisons to the murderous Astroworld concert.

Deepening of the crisis: It now costs almost $1.2 million to build a single affordable home in San Francisco.

Backlash response: SF supervisor apologizes for ‘inelegant’ comments about transgender contestant.

West side project: After 20 years of shutdowns and restarts, teacher housing opens in San Francisco.

New state strategy: Why nearly 2 million Californians might need to switch health insurance plans.

In synchronization: The Archbishop of San Francisco and Nancy Pelosi agree on this contentious political issue.

1,800 books of nostalgia

Three of Doggie Diner's iconic heads have popped up on JFK Drive in Golden Gate Park.

Three of Doggie Diner’s iconic heads have popped up on JFK Drive in Golden Gate Park.

Michael Short / Special for The Chronicle 2019

The cars may have vanished from John F. Kennedy Drive in Golden Gate Park, but some San Francisco icons of the past have taken up residence – three Doggie Diner dog heads that once dominated the fast food chain’s outlets Bay Area, long gone.

The 7-foot fiberglass dog heads, each weighing 600 pounds and sporting a chef’s hat and bow tie, are camped on a car-free stretch of JFK between Conservatory Drive West and Sixth Avenue. Dachshund heads with their long snouts sit on square podiums with a few Adirondack chairs in front – and are sometimes surrounded by curious, bemused or adoring fans who take selfies or touch noses.

“If you rub one of their noses, you’ve got a week of luck,” said John Law, a San Franciscan who considers himself the steward of three cartoonish canine heads.

Read more from Michael Cabanatuan.

Bay Briefing is written by Kellie Hwang and Anna Buchmann and sent to readers’ inboxes weekday mornings. Sign up for the newsletter here and contact the writers at and


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