At it's core, this theme taken from the National Science Clubs Summit in the Philippines almost reads like a slogan itself!
As I understand it, the event is geared towards helping young people understand the "truth behind the natural disasters and to empower science clubbers by informing them of the common natural disasters, how they are formed and what can be done to mitigate these disasters".
So, based on the subject matter - and the theme of galvanising and encouraging people to participate and join together in understanding the consequences of natural disasters and what we can do to take control of these tragic situations, perhaps an appropriate slogan would be:
"Science clubbers: Together we are a force of nature".
Not only is this a play on words, but it also represents various fundamental principles that the summit is promoting.