The spikes down on news are not really capitulation events. They are too fast and most of the volume is mean reversion traders. A true capitulation will be much slower and you'll see it clearly on the weekly chart where the same level starts to gain more and more volume.
I don't think that's a very practical distinction.
Intrinsically there is perhaps a difference between (news driven) crashes and (sentiment driven) capitulations, but they regularly co-occur and it becomes difficult if not impossible to precisely tell them apart. Even if you can tell them apart (by volume and how they stretch out over time), I am skeptical about claims what a "real" capitulation has to look like:
In late June/early July last year, there seemed to be consent among the technical traders that we "didn't properly capitulate yet". I remember several (detailed and thoughtful) threads that made this point, for example by slipperyslope and bear-in-a-suit-avatar guy.
Didn't really matter... early July came and the market decided what we had was good enough for a capitulation, and moved on. First into an upwards sloping consolidation (July to October), then (after the Silk Road flash crash that revealed the real buying pressure), into the ATH rally (October to December). Of course, China had something to do with it as well.
In my opinion, we capitulated just fine on April 11. Or at least, "good enough". The problem is just that, afterwards, buying pressure still turned out to be insufficient to support the price level resulting from that capitulation. That's why, after the initial upwards swing, a period of sideways trading follows, soon complemented by a few mini pump&dumps, and then the next capitulation is on the horizon.
I expect this cycle will continue until we are able to really defend any price level. Note that each capitulation cycle works towards that in two ways: 1) the resultant price level is lower, so whatever fiat is available is able to soak up more coins, and 2) it gives the market more time to recover, both in the sense that a majority starts feeling that we're read to go up again, but also by giving more time for new participants to enter the market, bringing in new fiat that accumulates and waits for a chance to enter.