Jonah is a great book. I'm particularly fond of chapter four.
Jonah 4:6-7
And the LORD God prepared a gourd, and made it to come up over Jonah, that it might be a shadow over his head, to deliver him from his grief. So Jonah was exceeding glad of the gourd. But God prepared a worm when the morning rose the next day, and it smote the gourd that it withered.
Jonah's life was somehow strangely lacking. God knew all about it, of course, and had something in hand ready to come over Jonah and deliver him. A selection of four different sizes is shown in the picture. The power of Jonah's delivering God's message to a wicked city helped so many people who may very well have gone the same way as Sodom and Gomorrah, turning into another Dead Sea as one would very much expect under the circumstances. God is Jesus, bringing a parallel message for the current age, echoing Jonah's lament and promising power – very much in line with your T-shirt campaign. Perhaps hoodies are also available? Getting back to Jonah and the verse you quoted stating his erstwhile location, I was reminded of what Jesus said.
Matthew 21:21
Jesus answered and said unto them, Verily I say unto you, If ye have faith, and doubt not, ye shall not only do this which is done to the fig tree* but also if ye shall say unto this mountain, Be thou removed, and be thou cast into the sea; it shall be done.
. * The fig tree had been treated the same as Jonah's gourd
For Jonah, an application of bottom-up power would have sorted out his dudgeon just as Jesus describes. For an average sized mountain (The Matterhorn for instance weighing approx. 39,630,300,000 tons) to move from Jerusalem to the Mediterranean Sea in 1 hour, a horse would be inadequate. God however is not inadequate and in this case provides the power of 7,133,454,000,000 horses. Add a "0" for Jonah who was ten times farther from the nearest sea than Jesus and to do it in a minute—since an hour seems a bit slow to qualify for "casting" status—multiply either value × 60, I guess. Perhaps an easier unit would be "peakNewYorks" which is a new unit I just made up based on
New York State's record peak demand which occurred in July 2013. Depending on the type of horse, at any given moment The Matterhorn would demand 150 to 200 thousand peakNY units or, if sustained for an hour, run that many New York States for an hour.
Perhaps something like that would be suitable for a hoody design?