The U.S. Geological Survey reported a magnitude 3.9 earthquake struck Tuesday off the coast of San Pedro, California.
The tremor struck around 3:26 p.m.
The epicenter was 16 miles from Long Beach and 14 miles from Rancho Palos Verdes. The quake was reportedly shallow at a depth of 2 miles.
Residents of the area said that the quake felt a lot bigger than the USGS report.
“Felt much stronger than a 3.9,” Chris DuRee, who was near downtown Long Beach, told KTLA-TV. “Rattled softly and then a few strong rolls. No damage anywhere.”
No reports of significant damage or injuries according to local officials.
Los Angeles is one earthquake away from losing a major part of their water supply.
The city of Los Angeles gets almost 90 percent of its water from three major aqueducts. These aqueducts run from the Colorado River, Owens Valley and the Sacramento-San Joaquin River Delta.
The aqueducts cross the well-known San Andreas Fault a total of 32 times.
This means any major quake along that fault line could end the water supply into the nation’s second largest city.
Mayor Eric Garcetti is calling on city officials to create better plans to protect the city’s water supply.
“[Water is] one of L.A.’s greatest earthquake vulnerabilities,” Garcetti told the L.A. Times. “If it were to take six months to get our water system back … residents and businesses would be forced to relocate for so long that they might never come back.”
Officials are looking to San Francisco’s Public Utilities Commission for a possible solution. The SFPUC recently installed a specially designed pipe over a fault line that has “accordion-like joints” that would allow the pipe to flex and move in any direction should the fault line move.
“We’re the first city that’s really bet its life on outside water,” U.S. Geological Survey seismologist Lucy Jones told the Times. “We have to cross the faults. There’s no way to not go over the fault.”
“There should be a serious dialogue among the agencies that are responsible for the three sources of water to Southern California,” said Thomas O’Rourke, a Cornell University engineering professor. “Sometimes it’s very difficult to go beyond those institutional barriers…. Somebody just has to take it up.”
An earthquake rattled northern Arizona Sunday night.
The U.S. Geological Survey reported the 4.7 magnitude quake centered 7 miles north of Sedona and was 6 miles deep. While no homes reported damage, the highway department had to clear rocks and debris from highways between Sedona and Flagstaf.
“Business as usual,” said David Brumbaugh, director of the Arizona Earthquake Information Center at Northern Arizona University told azfamily.com. “It’s nothing unusual to have earthquakes in this part of the state. Most of them are too small to be felt.”
The USGS reported over 1,200 people said they felt the quake.
“I think what I heard was the house kind of rattling,” said Donna Kearney Lomeo, a Sedona real estate agent, told azfamily. “It sounded like a bunch of balls rolling around on the roof.”
Smaller aftershocks have been felt in the region.
The Yellowstone volcano rumbled a little more in October than September.
Seismologists with the U.S. Geological Survey say there were a total of 98 earthquakes measured in October, 21 more than in September. However, the scientists said the magnitude of the quakes was lower than the highest ones in the previous month.
The volcano’s alert level remains at “normal.”
The data used by the USGS comes from the University of Utah’s seismograph stations located throughout Yellowstone National Park.
The latest report says that ground deformation in the area is continuing on the same steady path of 5 centimeters per year.
A NASA radar device has found previously unknown Napa Valley fault lines in the wake of the massive 6.0 Napa quake.
The 6.0 quake, which killed one woman and injured 170 people, was the biggest to shake northern California in 25 years. Over 800 homes were damaged and so far 103 are officially too damaged to repair.
As scientists from NASA and the U.S. Geological Survey discovered the West Napa Fault moved 18 inches along its 9.3-mile long length, they discovered a series of smaller faults that run parallel to West Napa Fault. The new small faults are believed to let off some of the strain on the region but are likely not significant enough to cause major quakes on their own.
“These really tiny ones are probably not big enough faults to have a significant earthquake, but it’s a good thing to have people go out and check whether they are part of a larger fault system,” said Eric Fielding, a geophysicist at NASA’s Jet Propulsion Laboratory.
USGS scientists say that the data is likely going to cause a revision in the quake’s magnitude up a tenth of a point to 6.1 when final data is assimilated.
A new map released by the federal government is showing that over half the U.S. is at greater risk for experiencing earthquakes.
The U.S. Geological Survey has updated the national seismic hazard maps for the first time since 2008. The new maps use research from the massive 2011 earthquake and tsunami off the Japanese coast along with the 2011 earthquake that shook Virginia and caused significant damage to national monuments in Washington, D.C.
Parts of Washington, Oregon, Utah, Oklahoma, Colorado, Wyoming and Tennessee have moved into the top two hazard zones in the new map according to project chief Mark Petersen.
Sixteen states have all or part of their territory in the highest risk category: Alaska, Hawaii, California, Oregon, Washington, Nevada, Utah, Idaho, Montana, Wyoming, Missouri, Arkansas, Tennessee, Illinois, Kentucky and South Carolina.
Most of the major regions are in the western part of the country, however, there is a major hazard area comprising of southeast Missouri, western Kentucky & Tennessee and eastern Arkansas.
A major earthquake woke up Mexico and Guatemala Monday morning, leaving at least four people dead.
The U.S. Geological Survey said the quake struck around 6:23 a.m. local time on the Pacific Coast about a mile from Puerto Madero on the Guatemalan border. The quake was initially measured at 7.1 but reduced to 6.9.
Two people died in the Guatemalan town of Pati when their home collapsed on them. A third was confirmed dead from a heart attack brought on by the stress of the quake. A wall in Huixtla crushed a man when a building collapsed.
Guatemalan President Otto Perez Molina said on the radio that a newborn was killed when hit by a collapsing wall but emergency personnel did not confirm it.
Massive power outages have left most of Guatemala without electricity. Early reports had hundreds of homes with significant damage and utility poles down for hundreds of miles.
A scientist with the U.S. Geological Survey said there is a possibility that a massive earthquake off the Alaskan coast Monday could be connected to an earthquake that struck hours earlier in New Zealand.
A 6.9 magnitude earthquake struck shortly after noon pacific time near the largely uninhabited Kermadex Islands, northeast of the country’s North Island. The quake was followed by an aftershock of 6.3 minutes later. The Alaskan quake of magnitude 7.9 struck off the Aleutian Islands shortly before 2 p.m. pacific time.
“The timing of it is such that we call the surface waves, the waves that travel around the circumference of the earth, arrived about the time the earthquake occurred,” Oppenheimer said.
However, Oppenheimer said the strength of the Alaskan quake indicates that it would have likely happened within a short time if it was not triggered by the New Zealand quake.
“There is just so much stress relieved within an earthquake of magnitude 7.9,” he said.
The Alaskan quake triggered a small tsunami with waves about half a foot high. Seismologists attribute the low height to the 63 mile depth of the quake.
New Zealand was hit with a trio of strong quakes Tuesday morning. Two quakes, magnitude 6.9 and 6.3, struck within minutes of each other. The third, a 6.2 magnitude quake, struck about 45 minutes later.
An earthquake rattled Virginia’s capital on Wednesday night, felt as far north was Washington D.C.
The quake, which measured 3.2 on the Richter Scale, was significantly smaller than the quake in the same region 2 ½ years ago that caused the Washington Monument to be closed until last week.
Virginia officials say over 1,300 people in the region reported feeling the impact of the quake. Quake reports came in from as far away as Maryland and the District of Columbia. No major damage was reported and no one was injured.
Residents told the Washington Post the quake reminded them of a big truck driving past their home or a very powerful thunderstorm.
The U.S. Geological Survey said the quake was centered only 7/10th of a mile underground about 30 miles west of Richmond.
History has been made by the U.S. Geological Survey in issuing the first earthquake warning for an area east of the Rocky Mountains.
The USGS issued a joint statement with the Oklahoma Geological Survey saying that the risk of an earthquake greater than 5.0 on the Richter scale has significantly increased after a rash of smaller quakes.
“We haven’t seen this before in Oklahoma, so we had some concerns about putting a specific number on the chances of it,” Robert Williams of the USGS said. “But we know from other cases around the world that if you have an increasing number of small earthquakes, the chances of a larger one will go up.”
The number of earthquakes per mile in Oklahoma this year is the same as California.
Most of the buildings in Oklahoma are built to withstand a light earthquake but officials say a medium size quake could cause mass devastation. The last major quake was November 2011, when a 5.6 magnitude quake destroyed 14 homes.
