I tried to identify the peaks which come from (IX, IY, EX and EY) by exciting the IM_P one by one.

166.84375 EYIMP 11:01:10
167.26562 NOEYIMP
167.8125 Locked loss when EYIMP excited(Two times)
168.3125 EYIMP 12:20:00
173.20312 NOEYIMP
174.28125 NOEYIMP

176.76562 NOEYIMP
178.125 NOEYIMP
178.67188 NOEYIMP
178.9375 NOEYIMP NOIYIMP NOIXIMP EXIMP 16:41:00
179.59375 NOEYIMP IYIMP 16:28:02
179.75 - 180 ?? POWER LINE?
180.125 NOEYIMP IYIMP 16:15:00
180.23438 NOEYIMP NOIXIMP NOIYIMP EXIMP 13:57:00
180.28125 NOEYIMP IXIMP 16:03:00
180.60938 NOEYIMP NOIYIMP NOIXIMP EXIMP 15:47:00
180.98438 NOEYIMP IYIMP 15:35:00
181.17188 NOEYIMP IXIMP 15:21:00
181.9375 NOEYIMP ??? several exitation in IX and IY
182.34375 NOEYIMP NOIYIMP IXIMP 15:08:00
182.45312 NOEYIMP NOIXIMP NOIYIMP EXIMP 14:59:00
182.92188 NOEYIMP NOIYIMP NOIXIMP EXIMP 14:49:00
183.23438 NOEYIMP EXIMP 14:39:00
183.625 NOEYIMP NOIYIMP NOIXIMP NOEXIMP
184.60938 NOEYIMP IYIMP 14:23:00
184.79688 NOETIMP NOIYIMP NOIXIMP EXIMP 14:14:00

187.53125 EYIMP 13:34:00
189.92188 EYIMP 13:08:00
191.15625 NOEYIMP
191.375 EYIMP 12:58:00

There would be the non violin mode peaks
~180 Hz power line
Three OMC bread resonant frequency *2
~89.6 * 2 = ~179.2
~90.8 * 2 = ~181.6
~91.1 * 2 = ~182.2