Earthquake (quarry blast) with magnitude of ML 1.7 on date 04-11-2021 and time 08:59:14 (Italy) in region 1 km E Foligno (PG)

A magnitude ML 1.7 (quarry blast) earthquake occured in region: 1 km E Foligno (PG), on

  • 04-11-2021 07:59:14 (UTC)
  • 04-11-2021 08:59:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.953, 12.722 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Event type: quarry blast.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Foligno PG 2 57155 57155
Spello PG 6 8645 65800
Trevi PG 9 8469 74269
Montefalco PG 9 5679 79948
Bevagna PG 9 5081 85029
Valtopina PG 12 1398 86427
Cannara PG 12 4305 90732
Gualdo Cattaneo PG 14 6155 96887
Castel Ritaldi PG 15 3278 100165
Campello sul Clitunno PG 15 2442 102607
Assisi PG 16 28299 130906
Giano dell'Umbria PG 18 3846 134752
Sellano PG 18 1079 135831
Nocera Umbra PG 19 5839 141670
Bastia Umbra PG 19 21874 163544

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km E of Foligno (57155 inhabitants)
32 Km SE of Perugia (166134 inhabitants)
44 Km N of Terni (111501 inhabitants)
78 Km NE of Viterbo (67173 inhabitants)
87 Km W of Teramo (54892 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
89 Km SE of Arezzo (99543 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.7 2021-11-04
07:59:14
42.9533 12.7223 8 2021-11-04
08:04:17
Sala Sismica INGV-Roma 97249051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-04 07:59:14 ± 0.07
Latitude 42.9533 ± 0.0027
Longitude 12.7223 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 97249051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 415
Semi-minor axis of confidence ellipse (meter) 122
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.57287
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 97249051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-04 08:04:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2021-11-04T07:59:41.26 3.0 undecidable manual S -0.37 0
IV.RM33.EHZ. 2021-11-04T07:59:35.45 0.1 undecidable manual S 141 0.5729 50 0.49 81
IV.CSP1.EHZ. 2021-11-04T07:59:29.32 0.1 undecidable manual S 68 0.3786 50 0.1 92
IV.CAFI.HHZ. 2021-11-04T07:59:28.20 3.0 positive manual P 0.24 0
IV.MURB.HHZ. 2021-11-04T07:59:28.15 0.1 undecidable manual S 335 0.3417 50 0.03 94
IV.MCIV.CHZ. 2021-11-04T07:59:28.04 3.0 undecidable manual P -2.07 0
IV.GAVE.EHZ. 2021-11-04T07:59:26.13 0.1 undecidable manual S 154 0.2896 103 -0.07 94
IV.NRCA.HHZ. 2021-11-04T07:59:26.96 0.1 undecidable manual S 113 0.3112 102 -0.04 94
IV.FDMO.HHZ. 2021-11-04T07:59:25.75 0.1 undecidable manual S 73 0.2797 104 -0.07 94
IV.RM33.EHZ. 2021-11-04T07:59:25.69 1.0 undecidable manual P 141 0.5729 50 -0.73 19
IV.MML1.EHZ. 2021-11-04T07:59:24.31 0.1 undecidable manual S 49 0.2428 106 -0.13 94
IV.ATCC.EHZ. 2021-11-04T07:59:24.19 0.1 undecidable manual S 345 0.2392 106 -0.14 94
IV.CSP1.EHZ. 2021-11-04T07:59:23.00 0.3 undecidable manual P 68 0.3786 50 -0.1 69
IV.MURB.HHZ. 2021-11-04T07:59:22.11 0.6 positive manual P 335 0.3417 50 -0.36 44
IV.CESI.HHZ. 2021-11-04T07:59:21.16 0.1 undecidable manual S 69 0.143 115 0.33 92
IV.FDMO.HHZ. 2021-11-04T07:59:21.07 0.3 positive manual P 73 0.2797 104 -0.07 71
IV.NRCA.HHZ. 2021-11-04T07:59:21.48 0.3 undecidable manual P 113 0.3112 102 -0.34 66
IV.ATCC.EHZ. 2021-11-04T07:59:20.21 1.0 undecidable manual P 345 0.2392 106 -0.07 24
IV.GAVE.EHZ. 2021-11-04T07:59:20.99 0.6 undecidable manual P 154 0.2896 103 -0.37 44
IV.MML1.EHZ. 2021-11-04T07:59:20.19 0.6 positive manual P 49 0.2428 106 -0.16 47
IV.ASSB.HHZ. 2021-11-04T07:59:19.53 0.1 undecidable manual S 333 0.1007 124 0.12 97
IV.CESI.HHZ. 2021-11-04T07:59:18.47 1.0 undecidable manual P 69 0.143 115 0.21 24
IV.ASSB.HHZ. 2021-11-04T07:59:17.55 0.1 positive manual P 333 0.1007 124 0.11 97
IT.FOPC.HGZ. 2021-11-04T07:59:17.50 0.1 undecidable manual S 319 0.0216 162 0.03 100
IT.FOPC.HGZ. 2021-11-04T07:59:16.52 0.1 positive manual P 319 0.0216 162 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:2.4 0.003195 0.18 AML other m 2021-11-04T07:59:19.60
IV.ASSB.HHE. ML:2.1 0.001865 1.24 AML other m 2021-11-04T07:59:19.88
IV.CESI.HHE. ML:1.5 0.000292 0.38 AML other m 2021-11-04T07:59:21.55
IV.CESI.HHN. ML:1.8 0.00066 0.3 AML other m 2021-11-04T07:59:22.14
IV.MML1.EHN. ML:1.7 0.000256 0.24 AML other m 2021-11-04T07:59:24.84
IV.MML1.HNN. ML:1.7 0.000261 0.24 AML other m 2021-11-04T07:59:24.84
IV.MML1.HNE. ML:1.8 0.0003505 0.64 AML other m 2021-11-04T07:59:24.53
IV.MML1.EHE. ML:1.6 0.0002115 0.24 AML other m 2021-11-04T07:59:24.85
IV.ATCC.EHN. ML:1.8 0.0003585 0.36 AML other m 2021-11-04T07:59:24.90
IV.ATCC.EHE. ML:1.8 0.000361 0.36 AML other m 2021-11-04T07:59:25.82
IV.FDMO.HHN. ML:1.3 0.0001065 1.34 AML other m 2021-11-04T07:59:25.21
IV.FDMO.HHE. ML:1.4 0.000124 0.74 AML other m 2021-11-04T07:59:26.42
IV.GAVE.EHE. ML:1.8 0.0002755 0.38 AML other m 2021-11-04T07:59:26.45
IV.GAVE.EHN. ML:1.7 0.0002435 0.42 AML other m 2021-11-04T07:59:26.53
IV.NRCA.HHN. ML:1.5 0.0001274 0.76 AML other m 2021-11-04T07:59:27.33
IV.NRCA.HHE. ML:1.5 0.0001225 0.18 AML other m 2021-11-04T07:59:28.13
IV.MURB.HHE. ML:2.2 0.000647 0.24 AML other m 2021-11-04T07:59:28.59
IV.MURB.HHN. ML:2.2 0.0006225 1.08 AML other m 2021-11-04T07:59:29.28
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download