8 REPORT—1858. 
Tasie VI.—Earthquakes of the Spanish Peninsula. 
Earthquakes with date of day or month. ot 
: oe 
> . o a n ss 
= . > 2 . i Oo ls 
2 Pilsilal. 5 2/8/83!) 8) 2 |e S| Total 
S I(2\/8/2\2)/618/8) S12) 8 1 24 8 lem 
Bae oer lee Bleiay (Ge ie 3 B 
Bl eee et of Bs (cess dF Lind Le ol een eee 
Ts eel ees act 3 3 
GIs) (ate! A i Leal pceudiies eG Uaeeitihees ahikeds We Uhes 1 4 
IND cectotes ®| ied | Teesy lly vow tilltaee! \tyeay Me entllivessaliice pl! gas 1 2 3 
PV recall eee [otuads i] See oie Le buaren emo [ener eaiepel Piet a aoret tl ae eS 8 
ON\0 bir hae Jl assem pce hese 2 Feria We edu sect 9 deta rt ea er ere tio at | 10 
ROVDT |) ives cl ooetllitecears ED Node 2 Ly} 32 1 1 1 10 
XVIII} 11 8 7 8 4 6 5 9 2 9/13 8 3 93 
UNE, | LO 8 [65 he ae eel LO Soc OTe) ag ean las 85 
Tota’.| 25 | 14/16/18] 9] 14/18] 16] 12] 23} 22/14] 19] 220 
Winter Spring Summer Autumn 
55 41 46 59 
Taking the mean monthly frequency =1, the relative monthly frequency, 
and that according to season, are as follows :—— 
: 8 ae 
po] BP Seiler) ngy fecal oo 
uw os == (S| o g =| 
i] =] a z Oo 2 
red m 2 red y o a = ~~ [o} o 3 
Fees lures limes tbe diate bcs = bon ha ya iba ice 
Sle lala lalisalaAlalastos]alsaA 
1°49) 0°84] 0°95] 1:07] 0:54) 0°84) 1°07] 0°95] 0°71) 1°37) 1°31) 0°84 
Winter Spring Summer Autumn 
1:09 0°82 0-91 117 
or in‘autumn and winter together, 114 earthquakes against 87 in the spring 
and summer. 
As respects observed horizontal directions, the ratios were— 
Nooo pee eet i dete ... 0°38 
WN, Be at Wine ote cen iemileae 
| MIE gic a9 hema Biawipen 5 
S.E. oo NW et nen cc aan 
Meas pis ath = 0 TN ha 1:91 
SOW, 0 NoHo aes A inte .. 0°38 
OY «ans Ela. ete a eae 0°76 
IN W535 oe Bie ee i Oe oo 0:38 
which, by the method of calculation already given as adopted by Perrey, 
gives for the mean horizontal direction— 
E. 31° 56’ S. to W. 31° 56’ N. 
This dednetion appears to agree tolerably well with the actually recorded 
directions of shocks in Portugal and Spain, whose focus seems to be beneath 
the sea, between Lisbon and the Azores, all of which, as well perhaps as the 
Canaries, are connected as one seismic region. Perrey states, that in the 
Pyrenean chain, taken separately, not only is the preponderance of seismic 
