NEW YORK (TheStreet) -- Yesterday on TheStreet, I provided color on news that Triton Digital will measure Pandora (P) listening at both the local and national level. These ratings cover the country's largest radio markets and, for all intents and purposes, equate to the numbers Arbitron publishes to gauge terrestrial radio listening.

In yesterday's article, I was the first to compare Pandora's results in a major local market, Dallas-Fort Worth, to that of terrestrial radio stations in the metro. Today, I look at the nation's second-largest market, Los Angeles, where Pandora puts up an even stronger performance than it did in DFW. Refer to Wednesday's piece for ratings-related definitions/methodology and a link to fair use guidelines of Arbitron's proprietary data.

In LA, during the month of March, for the Monday through Sunday, 6 Midnight period, Triton credits Pandora with Average Quarter Hour (AQH) ratings of 1.2, 0.9 and 0.7 among Adults 18-34, Adults 18-49 and Adults 25-54 years of age, respectively, in Los Angeles. Based on these numbers, it's not a stretch to say Pandora dominates Los Angeles radio.

Pandora has double the 18-34 AQH rating of the two terrestrial stations, legendary outlets Power 106 and the home of Ryan Seacrest's morning show, 102.7 KIIS-FM, tied for the top spot in Arbitron's LA figures for March. In the 18-49 year old demographic, Pandora is No. 1 in LA, based on Triton's measurement, beating out the same two stations by considerable margins. Pandora also takes the top spot in the all-important 25-54 year old category at 0.7, putting it ahead of top terrestrial stations, KIIS-FM and Adult Contemporary outlet KBIG-FM.

While this does not spell the absolute end for terrestrial radio, it's pretty close.

In one respect, big radio companies have an edge over Pandora and Internet radio in general. While Pandora can claim the No.1 spot in Los Angeles in the aforementioned crucial demos, companies such as

Clear Channel

(CCMO.PK) and

CBS Radio

(A division of CBS)

(CBS) - Get Report

can offer ad time across formats on their clusters in LA and other markets. As of this writing, Clear Channel owns 8 stations in Los Angeles, including KIIS and KBIG. CBS owns 6 outlets in the market.

Emmis Communications

(EMMS) - Get Report

owns Power 106, the other station mentioned in this article. That's pretty powerful, especially as terrestrial radio operators continue to move to multi-platform delivery of content.

At the same time, Pandora continues to increase its share of all radio listening and controls the market for Internet radio listening by a wide margin. And, as I


earlier this week on


, the company is ideally situated to capitalize on the rapidly growing mobile advertising space.

At day's end, Pandora only needs to take a relatively small amount of advertising away from terrestrial radio to deliver formidable revenue. In 2011, radio stations across the United States


$17.4 billion from advertisers. One percent of that number equals $174 million. Of course, 1 percent is an incredibly conservative estimate. Plus, any numbers derived from the $17.4 billion statistic only take into account advertising revenue Pandora takes from terrestrial radio coffers. Five percent brings that number up to $870 million.

According to Yahoo! Finance, analyst revenue estimates range from $543 and $685.8 million for the Pandora's next fiscal year (2014). For the current fiscal year (2013), analysts covering the company expect anywhere between $399.4 and $432.6 million in sales.

Pandora reports next Wednesday. Because the company would have to knock the snot out of the quarter to maintain the incredible momentum of the last week and month, I am not expecting much more upside. I do anticipate continued revenue growth, including in the important mobile arena. As Pandora continues to gain traction with local and national advertisers (and these buyers migrate some of their money to mobile), we'll start seeing the numbers that will trigger the long-term stock price appreciation I have been talking about.

At the time of publication, the author was long P