## 4 Results
### Time Evolution of \(Shs_{\text{Flux}}\) near the End of the Enruptive Activity  
From January to February 2012, the convective front below the BTL station was stable at the shallowest depths but progressively deepened starting in March 2012 (Figure 4). In particular, the convective front remained at a depth of about 3 m until 10 March, whereas during the following days, it progressively deepened, falling back to the deepest levels in the ground before the last lava fountain (24 April 2012; Table 1; Figure 4). We registered a first weak decrease in the steady level of the Z1 depth (Figure 4) on 9 March, that is, three days after LF1 and nine days before LF2 (see dates of the last paroxysmal activity in Table 2). The main features registered by this thermal monitoring of the ground were \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**SHS Peak (Figure 5)**} & **Data** & **SHS Flux** & **SHS Flux** \\  & **Maximum Value** & **(Hourly Value)** & **(Monthly Average)** \\
**N\({}^{\circ}\)** & **(DD/MM/YY & **Wat**\(\times\)**m\({}^{-2}\)** & **Wat**\(\times\)**m\({}^{-2}\)** \\  & **hh.mm)** & **Wat**\(\times\)**m\({}^{-2}\) & **Wat**\(\times\)**m\({}^{-2}\) \\ \hline
1 & 27/01/2010 19.43 & 37.55 & 22 \\
2 & 26/09/2010 03.00 & 35.73 & 25 \\
3 & 17/11/2010 14.00 & 29.44 & 22 \\
4 & 11/02/2011 03.00 & 46.93 & 32 \\
5 & 07/11/2011 12.00 & 48.64 & 43 \\
6 & 22/02/2012 11.00 & 45.86 & 27 \\
7 & 15/05/2012 11.00 & 25.60 & 12 \\
8 & 04/09/2012 12.00 & 22.40 & 14 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: List of the peaks of \(S\text{HS}_{\text{Flux}}\) labeled in Figure 5, with timing and intensity. The background colors indicate the different volcanic phases. Figure 4: Time variation of the Z1 depths showing the pulses of the convective front below the BTL station. The different colors in the background indicate the different volcanic phases. the variable modulations superimposed on the slowly deepening Z1 limit, the frequently missing data from the dataset recorded hourly (observed after 19 March, after 11 April, and from 22 April to September 2012), and the ultimate collapse, starting on the evening of 22 April. The hourly \(\mathrm{SHS_{Flux}}\) showed a marked negative temporal trend of \(\mathrm{SHS_{Flux}}\), starting from 9 March 2012 (Figure 6). The hourly \(\mathrm{SHS_{Flux}}\) record also showed minor cyclic fluctuations that are likely related to the daily variations in solar radiation ([PERSON] et al. [21]), \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**NSECN**} & **Date** & & & **NSEC** & **NER** \\ \({}^{\circ}\) **of Lava** & **of the Symbols** & **Start of** & **End of LF** & **Total Radiant** & **Variation of SHS** \\ \multirow{2}{*}{**Fountaina**} & **in Figure 6** & **LF (GMT) b** & **Energy** & **Flux** \\  & **(DD/MM/YY)** & & & **(J \(\times\) 10\({}^{16}\)) c** & **(W \(\times\) m\({}^{-2}\)) a** \\ \hline
0 & 2/3/12 & - & - & 0 & \(-\)0.03 \\
0 & 3/3/12 & - & - & 0 & 2.3 \\
**1** & **4/3/12** & **7**:30 & **9**:32** & **1.8** & 1.05 \\? & 5/3; 11/03 & - & - & - & \(-\)1\(-\)7.9 \\
0 & 6; 8; 9; & - & - & - & \(>\)0.7 \\
0 & 11/3/12 & **-** & - & - & \(>\)0.7 \\
**2** & **18/3/12** & **7**:15 & **9**:58 & **1.3** & 0.58 \\
0 & 30/03/12 & - & - & 0 & 0.86 \\
0 & 31/03/12 & - & - & - & \(-\)4.13 \\
**ND** & **10/4/12** & **2**:00 & **3**:30 & **ND** & \(-\)1.76 \\
**3** & **12/04/12** & **14**:10 & **15**:20 & **5.1** & \(-\)5.46 \\
0 & 16; 19; 22/4/12 & - & - & 0 & \(-\)1.38 0.71 \\
**4** & **23/4/12** & **1**:30 & **2**:15 & **8.8** & \(-\)8.78 \\
0 & 28/4/12 & - & - & 0 & 2.14 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Timing and relative intensity of the data reported in Figures 6 and 7. \({}^{\mathrm{a}}\) Original data of \(\mathrm{SHS_{Flux}}\) reported in Figure 6; 70” and “7” in the first column stand for the daily variations recorded when no lava fountain resulted by the references, ND stands for the undetermined radiant energy, N\({}^{\circ}\) 1–4 stand for the lava fountain evaluated by [PERSON] et al. [30].