Premise 1: I prefer to know if it's possible to realize this without much handwaving (hence the science-based tag) but, as this is going to be in a fantasy setting, answers which make it possible with just a couple little details explained by magic (e.g. the mesa is largely composed of handwavite crystals) are acceptable.
Premise 2: I looked up other questions on the site and went through the "similar questions" before submitting, but none of the questions nor the answers is really applicable imho.
Say I have a landscape which looks more or less like this:
I want this area to be called "The Drums" by the local populace, because the top of the rock formations attract a lot of lightning strikes and, when struck, resonate as if they were giant drums.
In order for this to be possible, I need two things to be plausible:
1: the material/shape/whatever of the mesas should attract lightning.
Quoting Wikipedia: The place where lightning occurs most often (according to the data from 2004 to 2005) is near the small village of Kifuka in the mountains of eastern Democratic Republic of the Congo, where the elevation is around 1,700 metres (5,600 ft). This region received 158 lightning strikes per square kilometer (409 per sq mi) a year. This doesn't say whether it's on land or on a lake.
Also, I couldn't find any source on whether or not there are certain kinds of soil composition which attract more lightning.
The fact that the mesas are higher than the surrounding areas helps, but I guess the fact that they're flat on top does not.
So: how do I make it so that the mesas receive at least 200 lightning strikes per square kilometer per year? This of course can be concentrated in a specific time window (e.g. march to october or whatever). The more often they're struck (even in a limited period) the better.
Like, if there could be a "Thunder Week" once a year in which you can see three or four lightning strikes per minute for entire hours every day, that would be perfect.
2: the mesa/mountain should resonate with thunder.
My first thought was: the mesas are hollow inside and reverberate easily.
Even so, I couldn't find any source as to where the sound of thunder originates from when lightning strikes the ground: is it the surface? is it the clouds? is it all along the entire "body" of the lightning strike?
(EDIT: it's pretty much the same principle as a jet's sonic boom, caused by the extremely quick change in temperature. So the answer to this sub-question is "all along the 'body' of the lightning strike". Thanks @AlexP)
If the sound originates either on the struck surface or all along the lightning bolt, does it physically make sense that the mesa's hollow body resonates and amplifies the sound of thunder?
If (and only if) one or both of the above are completely unrealistic, what is the smallest change I need to make (via magic or whatever wavy movement of my upper extremities) in order for it to make sense?