G. E. Alvarado and G. J. Soto, Pyroclastic flow generated by crater-wall collapse and outpouring of the lava pool of Arenal Volcano, Costa Rica, Bulletin of Volcanology, vol.63, issue.8, pp.557-568, 2002.
DOI : 10.1007/s00445-001-0179-9

C. Bean, I. Lokmer, and G. O-'brien, The influence of near-surface on long-period (LP) seismic signals and on moment tensor inversions: simulated examples from Mt, Etna. Journal of Geophysical Research, vol.113, pp.830810-1029, 2008.

J. P. Benoit and S. R. Mcnutt, New constraints on source processes of volcanic tremor at Arenal Volcano, Costa Rica, using broadband seismic data, Geophysical Research Letters, vol.22, issue.4, pp.449-452, 1997.
DOI : 10.1029/97GL00179

S. Cesca and M. T. Dahm, A frequency domain inversion code to retrieve time-dependent parameters of very long period volcanic sources, Computers & Geosciences, vol.34, issue.3, pp.235-246, 2007.
DOI : 10.1016/j.cageo.2007.03.018

B. A. Chouet, Volcano Seismology, Pure and Applied Geophysics, vol.160, issue.3, pp.739-788, 2003.
DOI : 10.1007/PL00012556

B. A. Chouet, T. Ohminato, P. B. Dawson, M. Martini, G. Saccorotti et al., Source mechanism of explosions at Stromboli Volcano, Italy, determined from moment-tensor inversion of very-long-period data, Journal of Geophysical Research, vol.108, p.1201910, 1029.

B. A. Chouet, P. B. Dawson, and A. Archinenga-ceballos, Source mechanism of Vulcanian degassing at Popocat??petl Volcano, Mexico, determined from waveform inversions of very long period signals, Journal of Geophysical Research, vol.99, issue.10, pp.10-1029, 2005.
DOI : 10.1029/2004JB003524

R. Davi, G. S. O-'brien, I. Lokmer, C. J. Bean, P. Lesage et al., Moment tensor inversion of explosive long period events recorded on Arenal volcano, Costa Rica, constrained by synthetic tests, Journal of Volcanology and Geothermal Research, vol.194, issue.4, pp.189-200, 2010.
DOI : 10.1016/j.jvolgeores.2010.05.012

URL : https://hal.archives-ouvertes.fr/insu-00564980

D. Patanè, Source Mechanism of Long Period events recorded by a high density seismic network during the 2008 eruption on Mt Etna, Journal of Geophysical Research, pp.10-1029, 2011.

M. T. Hagerty, S. Y. Schwartz, M. A. Garcés, and M. Protti, Analysis of seismic and acoustic observations at Arenal Volcano, Costa Rica, 1995???1997, Journal of Volcanology and Geothermal Research, vol.101, issue.1-2, pp.27-65, 1995.
DOI : 10.1016/S0377-0273(00)00162-1

B. Julian, Volcanic tremor: Nonlinear excitation by fluid flow, Journal of Geophysical Research: Solid Earth, vol.1350, issue.43, pp.11859-11877, 1994.
DOI : 10.1029/93JB03129

B. R. Julian, Period doubling and other nonlinear phenomena in volcanic earthquakes and tremor, Journal of Volcanology and Geothermal Research, vol.101, issue.1-2, pp.19-26, 2000.
DOI : 10.1016/S0377-0273(00)00165-7

H. Kumagai, B. A. Chouet, and P. B. Dawson, Source process of a long-period event at Kilauea volcano, Hawaii, Geophysical Journal International, vol.161, issue.1, pp.243-254, 2005.
DOI : 10.1111/j.1365-246X.2005.02502.x

P. Lesage, M. M. Mora, G. Alvarado, J. Pacheco, and J. P. Métaxian, Complex behavior and source model of the tremor at Arenal volcano, Costa Rica, Journal of Volcanology and Geothermal Research, vol.157, issue.1-3, pp.49-59, 2006.
DOI : 10.1016/j.jvolgeores.2006.03.047

URL : https://hal.archives-ouvertes.fr/insu-00268198

I. Lokmer, C. J. Bean, G. Saccorotti, and D. Patanè, Moment-tensor inversion of LP events recorded on Etna in 2004 using constraints obtained from wave simulation tests, Geophysical Research Letters, vol.2, issue.10, pp.10-1029, 2007.
DOI : 10.1029/2007GL031902

I. Lokmer, G. Saccorotti, D. Lieto, B. Bean, and C. J. , Temporal evolution of long-period seismicity at Etna Volcano, Italy, and its relationships with the 2004???2005 eruption, Earth and Planetary Science Letters, vol.266, issue.1-2, pp.205-220, 2004.
DOI : 10.1016/j.epsl.2007.11.017

S. R. Mcnutt, VOLCANIC SEISMOLOGY, Annual Review of Earth and Planetary Sciences, vol.33, issue.1, pp.461-491, 2005.
DOI : 10.1146/annurev.earth.33.092203.122459

W. Menke, Geophysical Data Analysis: Discrete Inverse Theory, First edition, p.pp, 1984.

J. P. Métaxian, P. Lesage, and B. Valette, Locating sources of volcanic tremor and emergent events by seismic triangulation: Application to Arenal volcano, Costa Rica, Journal of Geophysical Research: Solid Earth, vol.47, issue.11-12, 2002.
DOI : 10.1029/2001JB000559

J. Métaxian, G. S. O-'brien, C. J. Bean, and M. Mora, Locating volcano-seismic signals in the presence of rough topography: wave simulations on Arenal volcano, Costa Rica, Geophysical Journal International, vol.179, issue.3, pp.1547-1557, 2009.
DOI : 10.1111/j.1365-246X.2009.04364.x

S. Valade, F. Donnadieu, P. Lesage, M. Mora, A. Harris et al., Explosion mechanisms at Arenal volcano, Costa Rica: An interpretation from integration of seismic and Doppler radar data, Journal of Geophysical Research: Solid Earth, vol.114, issue.2-4, 2011.
DOI : 10.1029/2008JB005983

URL : https://hal.archives-ouvertes.fr/hal-00720266

S. Valade, F. Donnadieu, P. Lesage, M. Mora, A. Harris et al., Linking conduit and surface activity at Arenal volcano using broadband seismometers and Doppler radar, 2011.

D. W. Vasco, Deriving source?time functions using principal component analysis, Bulletin Seismological Society of America, vol.79, issue.3, pp.711-730, 1989.