Earthquake with magnitude of ML 1.1 on date 22-11-2021 and time 23:40:37 (UTC) in region 5 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km NE Cerreto di Spoleto (PG), on

  • 22-11-2021 23:40:37 (UTC)
  • 23-11-2021 00:40:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.85, 12.966 at 11 km depth.

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

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
Cerreto di Spoleto PG 5 1075 1075
Sellano PG 5 1079 2154
Preci PG 7 724 2878
Vallo di Nera PG 12 364 3242
Norcia PG 12 4957 8199
Visso MC 14 1107 9306
Cascia PG 15 3217 12523
Poggiodomo PG 16 117 12640
Campello sul Clitunno PG 16 2442 15082
Castelsantangelo sul Nera MC 16 281 15363
Monte Cavallo MC 16 145 15508
Sant'Anatolia di Narco PG 17 564 16072
Ussita MC 18 444 16516
Trevi PG 18 8469 24985
Scheggino PG 19 461 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 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 1.1 2021-11-22
23:40:37
42.8502 12.9655 11 2021-11-22
23:45:47
Sala Sismica INGV-Roma 97703301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-22 23:40:37 ± 0.06
Latitude 42.8502 ± 0.0018
Longitude 12.9655 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97703301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 190
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.11062
Epicentral distance of station farthest from the epicenter (degree) 0.29857
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 97703301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-22 23:45:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-11-22T23:40:48.46 0.3 undecidable manual S 36 0.2986 50 0.12 72
IV.LNSS.HNN. 2021-11-22T23:40:46.91 0.3 undecidable manual S 167 0.2536 50 -0.09 73
IV.FDMO.HHZ. 2021-11-22T23:40:45.45 0.1 undecidable manual S 26 0.2068 50 -0.16 96
IV.MC2.EHZ. 2021-11-22T23:40:44.77 0.3 undecidable manual S 69 0.1745 50 0.1 74
IV.CESI.HHZ. 2021-11-22T23:40:44.06 0.3 undecidable manual S 344 0.161 50 -0.2 72
IV.GAVE.EHZ. 2021-11-22T23:40:44.39 0.1 undecidable manual S 198 0.1664 50 -0.04 100
IV.MOMA.HNE. 2021-11-22T23:40:43.58 0.6 undecidable manual P 261 0.2932 50 0.1 48
IV.FEMA.HNN. 2021-11-22T23:40:43.18 0.3 undecidable manual S 29 0.1277 128 -0.1 75
IV.CSP1.EHZ. 2021-11-22T23:40:43.62 0.6 positive manual P 36 0.2986 50 0.06 48
IV.LNSS.HNN. 2021-11-22T23:40:42.75 0.1 undecidable manual P 167 0.2536 50 -0.04 98
IV.NRCA.HHZ. 2021-11-22T23:40:42.59 0.1 undecidable manual S 99 0.1106 132 -0.17 98
IV.MC2.EHZ. 2021-11-22T23:40:42.02 1.0 negative manual P 69 0.1745 50 0.57 22
IV.GAVE.EHZ. 2021-11-22T23:40:41.38 0.1 positive manual P 198 0.1664 50 0.08 98
IV.FEMA.HNN. 2021-11-22T23:40:41.05 0.3 undecidable manual P 29 0.1277 128 0.4 69
IV.FDMO.HHZ. 2021-11-22T23:40:41.98 0.6 positive manual P 26 0.2068 50 -0.01 50
IV.CESI.HHZ. 2021-11-22T23:40:41.24 0.1 positive manual P 344 0.161 50 0.03 99
IT.MTCL.HGN. 2021-11-22T23:40:40.89 0.3 undecidable manual P 10 0.1457 50 -0.06 75
IV.NRCA.HHZ. 2021-11-22T23:40:40.38 0.1 undecidable manual P 99 0.1106 132 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0002735 0.1 AML other m 2021-11-22T23:40:42.70
IV.NRCA.HHE. ML:1.2 0.0001815 0.12 AML other m 2021-11-22T23:40:42.77
IV.NRCA.HNE. ML:1.5 0.00030505495 0.448 AML other m 2021-11-22T23:40:44.92
IV.NRCA.HNN. ML:1.5 0.0003172109 0.5632 AML other m 2021-11-22T23:40:44.97
IV.CESI.HHE. ML:0.6 3.076866E-5 0.1536 AML other m 2021-11-22T23:40:45.43
IV.CESI.HHN. ML:0.8 4.920748E-5 0.1152 AML other m 2021-11-22T23:40:44.44
IV.CESI.HNE. ML:1.2 0.00012402425 0.7552 AML other m 2021-11-22T23:40:41.99
IV.CESI.HNN. ML:1.6 0.0003208756 0.4864 AML other m 2021-11-22T23:40:49.93
IV.GAVE.EHE. ML:0.7 3.449048E-5 0.2432 AML other m 2021-11-22T23:40:42.95
IV.GAVE.EHN. ML:0.8 4.5309245E-5 0.1152 AML other m 2021-11-22T23:40:45.26
IV.GAVE.HNE. ML:1.1 0.00010336523 1.0112 AML other m 2021-11-22T23:40:44.37
IV.GAVE.HNN. ML:1.3 0.00016143585 0.7168 AML other m 2021-11-22T23:40:50.53
IV.FDMO.HHE. ML:1.1 7.561443E-5 0.1664 AML other m 2021-11-22T23:40:45.64
IV.FDMO.HHN. ML:0.7 3.255439E-5 0.1408 AML other m 2021-11-22T23:40:45.61
IV.MC2.EHE. ML:0.8 5.028505E-5 0.2048 AML other m 2021-11-22T23:40:47.18
IV.MC2.EHN. ML:1 7.5302655E-5 0.704 AML other m 2021-11-22T23:40:47.82
IV.CSP1.EHE. ML:1.7 0.0001997054 2.2784 AML other m 2021-11-22T23:40:46.84
IV.CSP1.EHN. ML:1.3 8.130734E-5 0.8832 AML other m 2021-11-22T23:40:55.66
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