>Is this a normal number of "halts" on a given day?
Does not seem so.
https://www.nasdaqtrader.com/trader.aspx?id=TradingHaltHistory
Clicked around several dates in the above; seems 10x or more happened on 3/13, than happened on the other dates available.
https://www.cboe.com/us/equities/market_statistics/halts/
CBOE data above, not much there; clicked to download 2023 as CSV and there's only a few entries, one today, of SATO.
https://www.nyse.com/trade-halt-current
NYSE data here; like NASDAQ, lots more halts today/yesterday.
Hope this helps!