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Background:

Volcán Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5426 m 70 km SE of Mexico City to form North America’s 2nd-highest volcano.  The glacier-clad stratovolcano contains a steep-walled, 250-450 m deep crater.  The generally symmetrical volcano is modified by the sharp-peaked Ventorrillo on the NW, a remnant of an earlier volcano. 
At least three previous major cones were destroyed by gravitational failure during the Pleistocene, producing massive debris-avalanche deposits covering broad areas south of the volcano.  The modern volcano was constructed to the south of the late-Pleistocene to Holocene El Fraile cone.  Three major plinian eruptions, the most recent of which took place about 800 AD, have occurred from Popocatépetl since the mid Holocene, accompanied by pyroclastic flows and voluminous lahars that swept basins below the volcano.  Frequent historical eruptions, first recorded in Aztec codices, have occurred since precolumbian

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Sat, 19 Jul 2025, 21:46 | BY: EARTHQUAKEMONITOR

Iran was shaken near Shahrud, Semnan Province, by an earthquake of magnitude 5.2 only 7 minutes ago, the European-Mediterranean Seismological Centre (EMSC) reported.
The quake hit at a moderately shallow depth of 35. km beneath the epicenter near Shahrud, Semnan Province, Iran, after midnight on Sunday, July 20th, 2025, at 12:37 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the German Research Centre for Geosciences (GFZ), which listed it as a magnitude 5.3 earthquake. A third agency, the citizen-seismograph network of RaspberryShake, reported the same quake at magnitude 5.3.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Shahrud (pop. 131,900) located 34 km from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Azadshahr (pop. 47,600) located 43 km from the epicenter, Gonbad-e Kavus (pop. 131,400) 60 km away, Bandar-e Torkaman (pop. 54,000) 86 km away, and Damghan (pop. 67,700) 86 km away.
VolcanoDiscovery will

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Date and TimeMag
DepthDistanceLocationDetailsMap Jul 18, 08:16 am (GMT +3:30)

4.6

10 km8.8 km (5.5 mi) to the W 49 km north of Shahrud, Semnan Province, IranI FELT IT1 reportInfoJul 15, 10:44 am (Tehran)

4.6

10 km9 km (5.6 mi) to the SW 37 km east of Gorgan, Golestan Province, IranI FELT IT InfoJun 24, 09:08 pm (Tehran)

4.5

10 km9.2 km (5.7 mi) to the S 38 km north of Shahrud, Semnan Province, Iran InfoJun 2, 2024 11:29 am (Tehran)

4.5

49 km34 km (21 mi) to the SE 38 km northeast of Shahrud, Semnan Province, Iran InfoApr 19, 2024 02:02 am (Tehran)

4.3

10 km96 km (60 mi) to the SW 31 km northwest of Damghan, Semnan Province, Iran InfoJul 21, 2023 11:29 am (Tehran)

4.5

10 km72 km (45 mi) to the SW 41 km southwest of Gorgan, Golestan Province, Iran 1 reportInfoMar 22, 2023 02:08 pm (Tehran)

5.0

10 km38 km (24 mi) to the NW 34 km northeast of Gorgan, Golestan Province, Iran 11 reportsInfoSep 7, 2020 01:04 am (Tehran)

4.9

10 km32 km (20 mi) to the NE Turkmenistan-Iran Border Region 46 reportsInfoDec 28, 2016 12:26 am (Tehran)

4.9

30 km88 km (55 mi) to the NE Semnan Province, 36 km southeast of Kalaleh, Golestan Province, Iran 1 reportInfoAug 12, 2011 02:02 am (Tehran)

5.0

2.7 km39 km (24 mi) to the SW 25 km northwest of Shahrud, Semnan Province, Iran InfoMar 4, 2010 08:24 am (Ashgabat)

4.7

29 km77 km (48 mi) to the NW Turkmenistan InfoNov 29, 2005 05:57 am (Universal Time)

4.7

28 km76 km (47 mi) to the NW Turkmenistan InfoJan 10, 2005 10:17 pm (Tehran)

5.4

32 km43 km (27 mi) to the

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