Jericho Walls and Gaza?

Walls of Jericho Collapsing. Source of Illustration: Chosen People, Promised Land - Israel and Judah

Quite a few tunnels DO collapse with terrorists inside them sometimes senior ones. There have been numerous cases like this. The Palestinians believe that the Israelis have the technology to cause such events. Why not believe them? Why do the Israelis not do it every time? There may be exceptions when more conventional preventive measures are preferable.

My father told me of a theory explaining the fall of the walls of Jericho: The Hebrews walked around the city once every day for seven days blowing trumpets and so on. On the seventh day they walked around the walls seven times then stopped, blew the trumpets and shouted. The tremors in the earth caused by the walking around the walls, and the noise, and the sudden stopping and shouting, etc, could have brought the walls down.

In my youth I once glanced at an engineering text-book. It noted that soldiers are advised not to march in step when crossing bridges. Nothing new under son.

cf.

Joshua 6:
12 Now Joshua rose early in the morning, and the priests took up the ark of the LORD. 13 The seven priests carrying the seven trumpets of rams. horns before the ark of the LORD went on continually, and blew the trumpets; and the armed men went before them and the rear guard came after the ark of the LORD, while they continued to blow the trumpets. 14 Thus the second day they marched around the city once and returned to the camp; they did so for six days.
15 Then on the seventh day they rose early at the dawning of the day and marched around the city in the same manner seven times; only on that day they marched around the city seven times. 16 At the seventh time, when the priests blew the trumpets, Joshua said to the people, "Shout! For the LORD has given you the city. ..."
20 So the people shouted, and priests blew the trumpets; and when the people heard the sound of the trumpet, the people shouted with a great shout and the wall fell down flat, so that the people went up into the city, every man straight ahead, and they took the city.

cf.

2 Hamas fighters die in separate Gaza tunnel collapses
https://www.timesofisrael.com/2-...
Sept 15, 2017
===============================

Hamas operative killed in Gaza tunnel collapse
Member of terror group dies in cave-in, a common occurrence during digging and repair work in underground smuggling and attack shafts
https://www.timesofisrael.com/ha...
By TOI STAFF17 April 2017
===============================

Tunnel collapse claims 12th Hamas victim in two months - Israel News ...
https://www.haaretz.com' - Israel News
Mar 14, 2016

There are numerous cases like these.
===============================

Run a Google Search
tunnels in gaza collapse

cf.
' ===============================

IS ISRAEL BEHIND THE GAZA TUNNEL COLLAPSES?
https://www.frontpagemag.com/fpm...
As Hamas digs its way to doom.
March 8, 2016' 
P. David Hornik
'Extracts:
Earlier this month yet another tunnel Hamas was building in Gaza collapsed, killing at least one Hamas operative. It was the sixth Gaza tunnel collapse in recent months, one of which killed seven of the fighters.

What's behind it is a matter of public speculation in Israel. Hamas, of course, says Israel is behind the collapses. The latest Israeli media reports claim that the cement Hamas has been importing into Gaza since the summer 2014 war is of poor quality, and that explains the rickety tunnels.

Yet when, after a tunnel collapse in February, the Israeli official responsible for the territories was asked whether Israel was involved in these incidents, he replied: 'God knows. I would suggest the residents of the Gaza Strip not to occupy themselves with the tunnels and to get away from them, especially after seeing the results in recent days.'

Israelis living along the Gaza border have indeed been complaining bitterly about hearing tunnel-digging activity at night. The Israeli government has issued what sound like vague assurances. Hamas claims to have seen Israeli combat engineers operating at the border. Some Israeli pundits have suggested that at least some of what the Israeli residents are hearing at night is Israeli digging.
' ===============================

Israel Is Building a Secret Tunnel-Destroying Weapon
'http://foreignpolicy.com/2016/03...
As Hamas expands its tunnel network in Gaza, Israel, and the United States are collaborating on a clandestine project to thwart the Islamist group’s subterranean advantage.
 BY YARDENA SCHWARTZ | MARCH 10, 2016, 7:10 PM

Extracts:
During Operation Protective Edge, the name used by the Israel Defense Forces (IDF) for the 2014 war, the military uncovered and destroyed 32 cross-border tunnels that snaked for miles beneath Gaza and reached into Israeli territory. Many of them, according to the IDF, began inside homes and mosques in Gaza and ended inside or on the edge of Israeli border towns.

According to intelligence officials, Israeli engineers are working tirelessly to develop what's being called the 'Underground Iron Dome' - a system that could detect and destroy cross-border tunnels. According to a report on Israeli Channel 2, the Israeli government has spent more than $250 million since 2004 in its efforts to thwart tunnel construction under the Gaza border.

Among the Israeli companies working to develop the new anti-tunnel mechanism are Elbit Systems and Rafael Advanced Defense Systems, the same company that developed the Iron Dome rocket defense system. Both companies declined to provide any details due to security reasons, as did the IDF and other Israeli officials, who fear that such information could play into Hamas's hands. Yet according to intelligence sources who spoke with Foreign Policy on the condition of anonymity, the system involves seismic sensors that can monitor underground vibrations.
 ===============================

High-Tech Border Patrol: 5 New Tricks to Find Smuggler Tunnels By Joe Pappalardo
 Oct 1, 2009
 https://www.popularmechanics.com...
 Ground Penetrating Radar
 Seismic Waves
 Electrical Resistivity
 Cosmic Rays