Mountaintop Vernal Pool

Little Ms. E. and I went for a walk up to a vernal pool atop the Santa Ynez Mountains. I wanted to see how it looked after the area received over 45 inches of rain this season. Not surprisingly, it was still a giant mud puddle so soon after the last rainfall.

A snow capped peak barely visible rising above the foggy clouds in the background on the right.

What better than a pair of boots and the county's largest mud puddle to stomp in?

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Largest West Coast Tsunamis Generated in Santa Barbara Channel

“The two largest tsunamis known to have been generated on the western coast of the United States formed in the Santa Barbara Channel region. The earthquake of 1812 near Santa Barbara caused waves that reportedly flooded the lower part of town, and the 1927 shock off Point Arguello caused waves at least six feet high.”

U.S. Geological Survey professional paper (1969)

Although relatively minimal in their height and inland reach, and wholly incomparable to the Japanese tsunami, the California earthquakes of 1812 and 1927 near Santa Barbara generated record-sized tidal waves in the region. Both temblors are estimated to have been 7.1 in magnitude.

According to one publication, the oceanic surge resulting from the 1812 earthquake may have reached “15 feet at Gaviota, 30-35 feet at Santa Barbara, and 15 feet or more at Ventura.” Yet, while contemporary accounts make it clear that earthquakes did occur and that there was purportedly some change in the ocean, conflicting statements and a lack of corroborating evidence make it impossible to confirm whether or not a tsunami occurred, and if it did what its actual size or height may have been.

“The sea was observed to recede from the shore during the continuance of the shocks, and left the harbor dry for a considerable distance, when it returned in five or six heavy rollers, which overflowed the plain on which Santa Barbara is built. The inhabitants saw the recession of the sea, and being aware of the danger on its return, fled to the adjoining hills near the town to escape the probable deluge.  . . .The sea, on its return flowed inland little more than half a mile, and reached the lower part of town, doing but a trifling damage, destroying three small adobe buildings.”

Dr. John Boardman Trask, appointed president of the California Academy of Sciences in 1864, recounting the tsunami of 1812 based on the testimony of local residents.

“In 1812 the great earthquake occurred on the California coast and at that time every [Indian] soul left the island of Santa Rosa. The waters receded from the island several hundred yards. This so alarmed the Indians that, fearful that the island was about to be engulfed, they departed and were settled in bands of three or four hundred at the several missions. The above is the story told by the Indian.”

Ethnographer H. W. Henshaw in 1884 relating the story told to him by Anisetto Pajilacheet, one of the last remaining Chumash.

The tsunami generated by the temblor of November 4, 1927 was apparently of little consequence if it was noticed at all by coastal residents, because the reportage in the local papers had nothing to say about it at the time:

“‘QUAKE IS FELT ON STEAMSHIP

SAN PEDRO, Nov. 4.— The steamer Floridan, of the American-Hawaiian line, today reported to the federal radio here that it experienced four distinct earth shocks shortly after 11 a. m. off Point Arguello. The message said the sea appeared to ‘shimmy.'”

Ventura County Star November 4, 1927

“Long-Dry Artesian Wells in Lompoc Canyon Flow Anew

Shimmying earth in the Lompoc region yesterday brought joy to ranchers in and near Lompoc canyon where artesian wells, dry for many years, broke forth from the ground and started a flow that increased throughout the day.

The water will be used for the irrigation of a number of acres in and about the mouth of the canyon.

So copious was the flow from several of the wells that the grounds of the Lompoc canyon school were flooded and school was suspended for the day while workmen built canals to divert the water.

The Santa Ynez river also rose in its banks, probably being supplied from freshly gushing springs in the vicinity.”

Santa Barbara Morning Press, Saturday, November 5, 1927

The official wave heights, as recorded in a U.S. Geological Survey Professional Paper (1993) (PDF):

A tsunami was recorded on tide gages at San Francisco, La Jolla, San Diego, and Fort Point, and waves were observed at Pismo, Port San Luis (1.5 m), and Surf (1.8 m). Many aftershocks occurred.

 

Bibliography:

Geology, Petroleum Development, and Seismicity of the Santa Barbara Channel Region, California  [U.S. Geological Survey professional paper 1969], 64.

Many more accounts of the earthquake and tsunami of December 1812 have been compiled by Dr. George Pararas-Carayannis, as part of a 1967 study conducted at the behest of government regulators in connection with the San Onofre nuclear power plant. An excerpt of the study can be found at the following link: The Santa Barbara, California, Earthquakes and Tsunami(s) of December 1812.

UCSB Santa Barbara Earthquake History Page:

http://projects.crustal.ucsb.edu/sb_eqs/1812/chumash.html

http://projects.crustal.ucsb.edu/sb_eqs/1812/tsunami.html

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Backyard Sunset Silhouette

I once lived a few years in a landlocked town where there were no sunsets. The sun would set and the light fade to black, but no color would ever show. Growing up in Santa Barbara where technicolor sunsets seemed nearly as common as the sun itself, I remember how strikingly noticeable their absence was to me at the time. It was one of the many natural splendors found in this corner of California that I had always taken for granted.

March 30

Related Posts:

Palm Trees at Dusk

Matilija Creek Headwaters Foggy Sunset

Refugio Beach Sunset and Moonrise

Rincon Point Sunset

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Santa Barbara County 163% of Normal For Rainfall

Roadside view of a decent sized unnamed fall half hidden by trees along Matilija Creek.

With all the rain, water is gushing out of every crack in the mountains right now promising a bountiful and lush spring hiking season.

I went for a quick hike along Upper North Fork Matilija Creek late yesterday afternoon until dusk. Nobody was around.

Dark clouds clung to the peaks around Old Man Mountain, which had a smattering of snow.  All the little rivulets are running, the creeks and rivers are raging and the waterfalls roaring.

The Santa Barbara County rainfall total for the season so far, measured September 1 to August 31, is 163% of normal. Below are select rainfall totals as a percent of normal for this time of year, as well as the total in inches:

Cachuma 174% – 31.63
Carpinteria 136% – 23.81
Cuyama 150% – 10.00
Figueroa Mtn 158% – 30.68
Gibraltar Dam 156% – 37.36
Goleta 174% – 28.99
Lompoc 179% – 24.81
Los Alamos 156% – 21.00
San Marcos Pass 141% – 45.17
Santa Barbara 168% – 26.89
Santa Maria 188% – 22.85
Santa Ynez 179% – 25.29
Sisquoc 198% – 26.28
Updated 8am: 3/26/2011 Water Year 2011 County of S.B. (PDF)

As of my last count from news reports over 50 people have been rescued from the Great Outdoors in Santa Barbara and Ventura Counties after being stranded due to rain swollen streams. (VC Star, SB EdHat)

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Sulfur Mountain Oil Seeps, Ventura County

“California will be found to have more oil in its soil than all the whales in the Pacific Ocean. The oil is struggling to the surface at every available point and is running down the rivers for miles.”

-Professor Benjamin Silliman, Jr., Yale University, describing natural oil seeps near Sulfur Mountain in Ventura County (1864)

A chemist and geologist, Silliman traveled to California in 1864 in search of oil. He had been sent on a private mission by Thomas A. Scott, who was then serving as President Lincoln’s Assistant Secretary of War, and who also founded the California Petroleum Company.

Archaeological evidence indicates humans first began using tar and oil from natural seeps in the Santa Barbara area around 5000 B.C. Portuguese explorer Juan Rodriguez Cabrillo, sailing under the Spanish Crown, witnessed Chumash Native Americans using asphaltum in 1542 to seal their wood plank canoes and subsequently used it himself on two of his ships. In 1772, the Spanish expedition led by Juan Bautista De Anza came across springs of asphaltum oozing out of the ground and flowing into the ocean.

Natural seeps in California had been known of and used for a long time before Silliman’s venture, but he was one of the very first Americans to explore the new state for oil. His trip was launched in response to the stories about seeps that had filtered east through the years. While in California Silliman stopped in Ventura County and called upon a man named George Gilbert.

Fresh sticky oil seeping out of the ground right under the oak leaves.

In 1860, Gilbert noticed oil naturally draining out of the ground in the hills between Ventura and Ojai. Having experience in the whale oil refining industry, Gilbert wisely knew the black viscous substance oozing from the earth was a valuable commodity and set out collecting and processing it for market. Deposits of oil in the ground would help replace the living vats of oil swimming in the sea. While visiting Gilbert’s refinery, Silliman witnessed oil running into a nearby stream and it was that experience he was describing in the opening quotation at the top of this post.

Gilbert’s operation was located somewhere near Rancho Arnaz, which is not a very far walk from where the Sulfur Mountain site noted here is found. At the seep there is no trace of industry infrastructure or equipment that suggests it is the result of a well that was drilled and improperly capped, although that very well may be the case. The earth has been moved and mounded up somewhat around where the oil emerges from the ground, but that is about the only trace of prior activity at the site aside from barbed wire fencing.

The oil flows right down into the creek, which in the rainy season eventually dumps into the Ventura River. There are also a number of other seeps in the near vicinity along the banks of the creek and they all show fresh, sticky black oil. In other places there are hardened tar deposits.

The Sulfur Mountain location today is illustrative of the types of natural seepage that have historically flowed and still flow from the soils and seafloor of California. Numerous local place names reflect this characteristic like Coal Oil Point in Goleta, La Brea Creek on the west end of the San Rafael Wilderness and Oil Canyon near Summerland to name just a select few.

The source of the seep, just a small roundish spot of oil in the dirt.

The oil originates just out of frame on the right and flows past this cactus and down onto the flats and into the creek.

Oil headed toward the creek. Liquid, and freely flowing, it reflects blue from the clear skies overhead. This photo was taken in early fall prior to seasonal rains. What looks like mud is a result of the oil.

Crusty older tar deposits with a mix of water and oil flowing slowly down the slope.

A sycamore tree that is rooted in the creek and coated with oil.

The seep is large enough that it can be seen on satellite imagery using Google.

Bibliography:

Ruth Sheldon Knowles, Greatest Gamblers: The Epic American Oil Exploration (University of Oklahoma Press; Second edition, August 1980), 44.

University of California, Santa Barbara Hydrocarbon Seeps Project

Ojai Valley Museum of History and Art

Venoco, Inc

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