{"id":109168,"date":"2025-07-29T14:06:07","date_gmt":"2025-07-29T12:06:07","guid":{"rendered":"https:\/\/geosurveys.it\/?page_id=109168"},"modified":"2025-07-30T16:24:15","modified_gmt":"2025-07-30T14:24:15","slug":"magnetotelluric-mt-audio-magnetotellutic-amt","status":"publish","type":"page","link":"https:\/\/geosurveys.it\/en\/magnetotelluric-mt-audio-magnetotellutic-amt\/","title":{"rendered":"Magnetotelluric (MT) Audio Magnetotellutic (AMT)"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row row_height_percent=&#8221;100&#8243; back_color=&#8221;color-jevc&#8221; back_image=&#8221;108870&#8243; kburns=&#8221;yes&#8221; overlay_color=&#8221;color-jevc&#8221; overlay_alpha=&#8221;20&#8243; gutter_size=&#8221;4&#8243; column_width_percent=&#8221;100&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; content_parallax=&#8221;0&#8243; uncode_shortcode_id=&#8221;140909&#8243; overlay_color_type=&#8221;uncode-palette&#8221; back_color_type=&#8221;uncode-palette&#8221;][vc_column column_width_percent=&#8221;100&#8243; position_horizontal=&#8221;left&#8221; position_vertical=&#8221;middle&#8221; gutter_size=&#8221;3&#8243; style=&#8221;dark&#8221; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;1\/1&#8243; uncode_shortcode_id=&#8221;704479&#8243;][vc_row_inner][vc_column_inner column_width_percent=&#8221;100&#8243; gutter_size=&#8221;3&#8243; style=&#8221;dark&#8221; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;1\/1&#8243; uncode_shortcode_id=&#8221;103021&#8243;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; text_weight=&#8221;700&#8243; uncode_shortcode_id=&#8221;160735&#8243;]ELECTROMAGNETIC METHODS[\/vc_custom_heading][vc_custom_heading heading_semantic=&#8221;h1&#8243; text_font=&#8221;font-377884&#8243; text_size=&#8221;h1&#8243; text_weight=&#8221;500&#8243; css_animation=&#8221;curtain-words&#8221; uncode_shortcode_id=&#8221;124439&#8243;]Magnetotelluric (MT) Audio Magnetotellutic (AMT)[\/vc_custom_heading][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row unlock_row_content=&#8221;yes&#8221; row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;3&#8243; bottom_padding=&#8221;0&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; column_width_percent=&#8221;100&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; content_parallax=&#8221;0&#8243; uncode_shortcode_id=&#8221;204319&#8243;][vc_column column_width_percent=&#8221;100&#8243; gutter_size=&#8221;3&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;1\/1&#8243; uncode_shortcode_id=&#8221;149024&#8243;][vc_row_inner row_inner_height_percent=&#8221;0&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; uncode_shortcode_id=&#8221;104431&#8243;][vc_column_inner column_width_percent=&#8221;100&#8243; gutter_size=&#8221;3&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;-2&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;7\/12&#8243; uncode_shortcode_id=&#8221;127737&#8243;][vc_single_image media=&#8221;108866&#8243; media_width_percent=&#8221;80&#8243; uncode_shortcode_id=&#8221;275398&#8243;][\/vc_column_inner][vc_column_inner column_width_percent=&#8221;100&#8243; position_vertical=&#8221;middle&#8221; gutter_size=&#8221;2&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; css_animation=&#8221;bottom-t-top&#8221; animation_delay=&#8221;300&#8243; width=&#8221;5\/12&#8243; uncode_shortcode_id=&#8221;218625&#8243; css=&#8221;.vc_custom_1748424728366{padding-right: 30px !important;}&#8221;][vc_custom_heading heading_semantic=&#8221;h3&#8243; text_size=&#8221;h3&#8243; uncode_shortcode_id=&#8221;134007&#8243;]The magnetotelluric (MT) and audiomagnetotelluric (AMT) methods are based on the analysis of natural variations in electric and magnetic fields measured at the surface, generated by phenomena such as the interaction of the solar wind with the Earth&#8217;s magnetosphere and global thunderstorm activity.[\/vc_custom_heading][vc_empty_space empty_h=&#8221;1&#8243;][vc_column_text uncode_shortcode_id=&#8221;476194&#8243;]These electromagnetic variations, which propagate into the Earth&#8217;s interior, allow investigation of the distribution of electrical properties (resistivity) in subsurface materials. The classical magnetotelluric (MT) survey is mainly used for studies at great depths, due to the ability of low-frequency waves to penetrate up to tens of kilometers.[\/vc_column_text][vc_column_text uncode_shortcode_id=&#8221;148921&#8243;]Its high-frequency variant, known as audiomagnetotelluric (AMT), on the other hand, allows for greater resolution at shallower depths, generally between a few hundred meters and a few tens of meters. The high depth of investigation, combined with the absence of artificial sources and virtually zero environmental impact, makes the MT-AMT method an extremely effective and noninvasive tool for geophysical exploration in both regional and local settings.[\/vc_column_text][vc_empty_space empty_h=&#8221;3&#8243; desktop_visibility=&#8221;yes&#8221; mobile_visibility=&#8221;yes&#8221;][vc_empty_space empty_h=&#8221;2&#8243; desktop_visibility=&#8221;yes&#8221; medium_visibility=&#8221;yes&#8221;][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row unlock_row_content=&#8221;yes&#8221; row_height_percent=&#8221;0&#8243; override_padding=&#8221;yes&#8221; h_padding=&#8221;2&#8243; top_padding=&#8221;0&#8243; bottom_padding=&#8221;3&#8243; overlay_alpha=&#8221;50&#8243; gutter_size=&#8221;3&#8243; column_width_percent=&#8221;100&#8243; shift_y=&#8221;0&#8243; z_index=&#8221;0&#8243; content_parallax=&#8221;0&#8243; uncode_shortcode_id=&#8221;141228&#8243;][vc_column column_width_percent=&#8221;100&#8243; 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uncode_shortcode_id=&#8221;170617&#8243; sep_color_type=&#8221;uncode-palette&#8221;][\/vc_column_inner][vc_column_inner column_width_percent=&#8221;100&#8243; position_vertical=&#8221;bottom&#8221; gutter_size=&#8221;2&#8243; style=&#8221;dark&#8221; back_color=&#8221;color-172302&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;3\/12&#8243; uncode_shortcode_id=&#8221;594545&#8243; back_color_type=&#8221;uncode-palette&#8221;][vc_separator sep_color=&#8221;accent&#8221; medium_visibility=&#8221;yes&#8221; mobile_visibility=&#8221;yes&#8221; uncode_shortcode_id=&#8221;472050&#8243; sep_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; uncode_shortcode_id=&#8221;158546&#8243;]Large-scale geological studies[\/vc_custom_heading][vc_separator sep_color=&#8221;accent&#8221; 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z_index=&#8221;0&#8243; desktop_visibility=&#8221;yes&#8221; uncode_shortcode_id=&#8221;204730&#8243;][vc_column_inner column_width_percent=&#8221;100&#8243; position_vertical=&#8221;bottom&#8221; gutter_size=&#8221;2&#8243; style=&#8221;dark&#8221; back_color=&#8221;color-172302&#8243; overlay_alpha=&#8221;50&#8243; shift_x=&#8221;0&#8243; shift_y=&#8221;0&#8243; shift_y_down=&#8221;0&#8243; z_index=&#8221;0&#8243; medium_width=&#8221;0&#8243; mobile_width=&#8221;0&#8243; width=&#8221;1\/1&#8243; uncode_shortcode_id=&#8221;172332&#8243; back_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;h4&#8243; text_size=&#8221;h4&#8243; text_transform=&#8221;uppercase&#8221; uncode_shortcode_id=&#8221;257058&#8243;]Fields of Application:[\/vc_custom_heading][vc_empty_space empty_h=&#8221;1&#8243;][vc_separator sep_color=&#8221;accent&#8221; uncode_shortcode_id=&#8221;170617&#8243; sep_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; uncode_shortcode_id=&#8221;115136&#8243;]Regional and local mineral exploration[\/vc_custom_heading][vc_separator sep_color=&#8221;accent&#8221; uncode_shortcode_id=&#8221;170617&#8243; sep_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; uncode_shortcode_id=&#8221;196085&#8243;]Geothermal prospecting[\/vc_custom_heading][vc_separator sep_color=&#8221;accent&#8221; uncode_shortcode_id=&#8221;170617&#8243; sep_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; uncode_shortcode_id=&#8221;171958&#8243;]Large-scale geological studies[\/vc_custom_heading][vc_separator sep_color=&#8221;accent&#8221; uncode_shortcode_id=&#8221;170617&#8243; sep_color_type=&#8221;uncode-palette&#8221;][vc_custom_heading heading_semantic=&#8221;p&#8221; text_size=&#8221;&#8221; uncode_shortcode_id=&#8221;190932&#8243;]Hydrogeological research[\/vc_custom_heading][vc_separator sep_color=&#8221;accent&#8221; 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