Aliso Canyon Oil Field

The Aliso Canyon gas leak (also called Porter Ranch gas leak and Porter Ranch gas blowout) was a massive natural gas leak in the Santa Susana Mountains near Porter Ranch, Los Angeles, California. Discovered on October 23, 2015, gas was escaping from a well within the Aliso Canyon underground storage facility. This second-largest gas storage facility of its kind in the United States belongs to the Southern California Gas Company (SoCal Gas), a subsidiary of Sempra Energy. On January 6, 2016, Governor Jerry Brown issued a state of emergency. On February 11, the gas company reported that it had the leak under control. On February 18, state officials announced that the leak was permanently plugged. An estimated 97,100 tonnes (95,600 long tons; 107,000 short tons) of methane and 7,300 tonnes (7,200 long tons; 8,000 short tons) of ethane were released into the atmosphere. The initial effect of the release increased the estimated 5.3 Gt of methane in the Earth's atmosphere by about 0.002%, diminishing to half that in 6–8 years. It was widely reported to have been the worst single natural gas leak in U.S. history in terms of its environmental impact. By comparison, the entire rest of the South Coast Air Basin combined, with a population of about 18 million people, emits approximately 413,000 tonnes of methane and 23,000 tonnes of ethane annually. The Aliso gas leak's carbon footprint could be larger than the Deepwater Horizon leak in the Gulf of Mexico.

The Sesnon Fire (also known as the Porter Ranch Fire) was a wildfire that broke out near the oil fields of Oat Mountain, north of Porter Ranch, California, on Monday October 13, 2008. The cause of this fire was a power line falling onto dry brush near a drainage area. A state of emergency was declared by Governor Arnold Schwarzenegger on October 13 in Los Angeles and Ventura Counties. The fire burned more than 22 square miles (57 km2) and cost US$7.9 million to fight. This fire occurred concurrently two others, one in San Diego County and another at the eastern end of the San Fernando Valley. One person lost their life due to the low visibility on highways because of the smoke from the fire.

Renaissance Summit (also known simply as Renaissance or Renaissance at Porter Ranch) is a gated housing subdivision in the northwest San Fernando Valley of the city of Los Angeles, at the highest point in the Porter Ranch neighborhood. Its building and opening was championed by major local political figures in the 1980s and 1990s but was also an ongoing source of controversy in the area.

Mission Point, better known as "Mission Peak" to locals, is a spur of Oat Mountain in Los Angeles County, Southern California. At 2,771 feet (845 m) high, it is the second highest peak of the Santa Susana Mountains after Oat Mountain.

Porter Ranch is a suburban-type neighborhood of the City of Los Angeles in the northwest portion of the San Fernando Valley.

Santa Clarita Woodlands Park is a 4,000 acre (1,619 hectare) open space preserve located in the northeastern foothills of the Santa Susana Mountains near Santa Clarita, California.

Porter Ranch town center is a shopping center located in Porter Ranch, CA, USA. It is anchored by Walmart, Ralphs, Burlington & Best Buy. The center has 45 tenants scattered throughout the shopping center and is located next to the Ronald Reagan Freeway.

Oat Mountain is a peak of the Santa Susana Mountains overlooking the San Fernando Valley (near Los Angeles, California) to the south and southeast. Oat Mountain is the highest peak in the Santa Susana Mountains of California. The Los Angeles district of Chatsworth is to the south of the mountain. There are many microwave relay antennas as well as Doppler weather equipment at Oat Mountain. SoCal Gas has several wells in the area as well.

The Santa Susana Mountains are a transverse range of mountains in Southern California, north of the city of Los Angeles, in the United States. The range runs east-west, separating the San Fernando Valley and Simi Valley on its south from the Santa Clara River Valley to the north and the Santa Clarita Valley to the northeast. The Oxnard Plain is to the west of the Santa Susana Mountains.

United Airlines Flight 34 was a scheduled flight departing from San Francisco to Los Angeles, California, on December 27, 1936. At 7:36 am (Pacific time), the co-pilot requested the UAL localizer beacon at Burbank be turned on. The company radio requested aircraft position, to which the co-pilot replied, "just a minute." The aircraft crashed at the head of Rice Canyon (near Newhall, California) at 7:38 am, killing all 12 passengers and crew. The probable cause was found to be "...an error on the part of the pilot for attempting to fly through Newhall pass at an altitude lower than the surrounding mountains without first determining by radio the existing weather."

Shepherd Church is a nondenominational megachurch based in Porter Ranch, Los Angeles, California, USA. The senior pastor is Dudley Rutherford.

O'Melveny Park is a public park located in the Santa Susana Mountains, in the Granada Hills community of the northern San Fernando Valley, in the northernmost portion of the City of Los Angeles, California.