The following is the time and text for this Psalm.
1God is our refuge and strength, a very present help in trouble.
2You have been with us always; therefore we will not fear when the land quakes and mountains are shaken into the heart of the sea,
3though its waters roar and be troubled, though the mountains shake with its force.
4There is a river, the streams of which will make glad the city of our god, the holy place of the most high.
5God is in the middle of her; she will not be moved; god will help her in the early morning.
6The heathen raged, the kingdoms trembled; he raised his voice, the land quaked.
7Yahvah of hosts is with us; the god of Jacob is our refuge.
8Come, look at the works of god, for he does wonders in the land.
9He makes wars cease to the end of the land; he breaks the bow and cuts the spear apart; he burns the chariot in the fire.
10Repent, and know that I am god; I am exalted among the heathen and I am exalted in the land.
11Yahvah of hosts is with us; the god of Jacob is our refuge.
A few hours ahead of theoretical time for this Psalm, there was a photo shoot of Air Force One over the Hudson River in New York City. Though the shoot had been planned, and the NYPD had been notified, they had been sworn to secrecy. None of the public knew this was a staged event.
The effect had been anticipated by the planners of the photo shoot. Thousands of worried New York City office workers fled to the streets as they expected that the plane would either crash like 911 or be shot down by the jet.
The river, in this case the Hudson, is mentioned in the Psalm, and the reverse nature of New York City being shaken while the City of God is not is another match to this Psalm.
The term "waters" are also symbolic of peoples, and the peoples of New York City were very much shaken up by the events this day.
There was a M 6.0 earthquake south of Mexico City. The quake seemed to add insult to injury as the Swine Flu outbreak had continued unabated in Mexico. The quaking or shaking is also seen in this Psalm.