Earthquake with magnitude of ML 1.8 on date 12-11-2021 and time 11:16:30 (UTC) in region 4 km W Cerreto di Spoleto (PG)

A magnitude ML 1.8 earthquake occured in region: 4 km W Cerreto di Spoleto (PG), on

  • 12-11-2021 11:16:30 (UTC)
  • 12-11-2021 12:16:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.826, 12.866 at 10 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 4 1075 1075
Vallo di Nera PG 6 364 1439
Campello sul Clitunno PG 7 2442 3881
Sellano PG 9 1079 4960
Sant'Anatolia di Narco PG 11 564 5524
Trevi PG 11 8469 13993
Scheggino PG 13 461 14454
Poggiodomo PG 14 117 14571
Spoleto PG 15 38218 52789
Preci PG 15 724 53513
Castel Ritaldi PG 16 3278 56791
Cascia PG 17 3217 60008
Norcia PG 19 4957 64965
Montefalco PG 19 5679 70644
Foligno PG 20 57155 127799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SE of Foligno (57155 inhabitants)
34 Km NE of Terni (111501 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
71 Km W of Teramo (54892 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
96 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 1.8 2021-11-12
11:16:30
42.8263 12.866 10 2021-11-12
11:22:58
Sala Sismica INGV-Roma 97414781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-12 11:16:30 ± 0.07
Latitude 42.8263 ± 0.0027
Longitude 12.8660 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97414781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 348
Semi-minor axis of confidence ellipse (meter) 340
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 127
Circular confidence region, given by single value of horizontal uncertainty (meter) 350
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.1358
Epicentral distance of station farthest from the epicenter (degree) 0.5315
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 97414781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-12 11:22:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-11-12T11:16:49.69 0.6 undecidable manual S 19 0.5315 50 0.73 38
IV.GUMA.HHZ. 2021-11-12T11:16:46.44 0.1 undecidable manual S 55 0.4164 50 0.88 74
IV.SNTG.HHZ. 2021-11-12T11:16:46.49 0.1 undecidable manual S 7 0.4317 50 0.48 86
IV.CSP1.EHZ. 2021-11-12T11:16:44.26 0.1 undecidable manual S 43 0.3633 50 0.29 91
IV.ATCC.EHZ. 2021-11-12T11:16:44.42 0.3 undecidable manual S 335 0.3948 50 -0.49 65
IV.MML1.EHZ. 2021-11-12T11:16:42.05 0.3 undecidable manual S 15 0.2977 50 0.03 73
IV.EL6.EHZ. 2021-11-12T11:16:41.21 0.1 positive manual P 19 0.5315 50 0.06 92
IV.ARRO.EHZ. 2021-11-12T11:16:41.12 0.1 undecidable manual S 197 0.2581 50 0.27 93
IV.LNSS.HHZ. 2021-11-12T11:16:40.51 0.1 undecidable manual S 150 0.2572 50 -0.33 92
IV.FDMO.HHZ. 2021-11-12T11:16:40.70 0.1 undecidable manual S 38 0.2653 50 -0.37 91
IV.ASSB.HHZ. 2021-11-12T11:16:40.80 0.3 undecidable manual S 325 0.2644 50 -0.24 70
IV.MC2.EHZ. 2021-11-12T11:16:40.58 0.1 undecidable manual S 70 0.2518 50 -0.08 97
IV.SNTG.HHZ. 2021-11-12T11:16:39.28 0.1 undecidable manual P 7 0.4317 50 -0.17 92
IV.MF5.EHZ. 2021-11-12T11:16:39.41 0.1 undecidable manual P 69 0.4632 50 -0.58 82
IV.MOMA.HHZ. 2021-11-12T11:16:39.62 0.3 undecidable manual S 264 0.2185 112 0.05 74
IV.GUMA.HHZ. 2021-11-12T11:16:39.44 0.1 positive manual P 55 0.4164 50 0.25 91
IV.NRCA.HNZ. 2021-11-12T11:16:38.10 0.1 undecidable manual S 88 0.1817 116 -0.2 96
IV.CESI.HHZ. 2021-11-12T11:16:38.25 0.1 undecidable manual S 9 0.1808 116 0 100
IV.CSP1.EHZ. 2021-11-12T11:16:38.22 0.1 positive manual P 43 0.3633 50 -0.06 95
IV.ATCC.EHZ. 2021-11-12T11:16:38.84 0.6 negative manual P 335 0.3948 50 0.02 48
IV.MML1.EHZ. 2021-11-12T11:16:37.03 0.1 positive manual P 15 0.2977 50 -0.12 96
IV.MC2.EHZ. 2021-11-12T11:16:36.26 0.1 positive manual P 70 0.2518 50 -0.1 97
IV.ARRO.EHZ. 2021-11-12T11:16:36.54 0.3 positive manual P 197 0.2581 50 0.07 73
IV.LNSS.HHZ. 2021-11-12T11:16:36.37 0.1 positive manual P 150 0.2572 50 -0.1 97
IV.FDMO.HHZ. 2021-11-12T11:16:36.39 0.3 positive manual P 38 0.2653 50 -0.21 71
IV.GAVE.EHZ. 2021-11-12T11:16:36.91 0.1 undecidable manual S 171 0.1358 123 0.17 97
IV.ASSB.HHZ. 2021-11-12T11:16:36.43 0.3 undecidable manual P 325 0.2644 50 -0.15 72
IV.CESI.HHZ. 2021-11-12T11:16:35.02 0.1 positive manual P 9 0.1808 116 0.05 99
IV.MOMA.HHZ. 2021-11-12T11:16:35.81 0.3 positive manual P 264 0.2185 112 0.08 73
IV.GAVE.EHZ. 2021-11-12T11:16:34.27 0.1 undecidable manual P 171 0.1358 123 0.17 97
IV.NRCA.HNZ. 2021-11-12T11:16:34.93 0.6 negative manual P 88 0.1817 116 -0.07 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:1.9 0.0006395 0.56 AML other m 2021-11-12T11:16:38.32
IV.NRCA.HHN. ML:2 0.0006665 0.58 AML other m 2021-11-12T11:16:38.32
IV.NRCA.HNE. ML:1.8 0.0005415 0.1 AML other m 2021-11-12T11:16:38.46
IV.NRCA.HHE. ML:1.9 0.0005615 0.08 AML other m 2021-11-12T11:16:38.46
IV.CESI.HHN. ML:2 0.000751 0.3 AML other m 2021-11-12T11:16:38.55
IV.CESI.HHE. ML:1.9 0.000562 0.54 AML other m 2021-11-12T11:16:38.30
IV.MOMA.HHE. ML:1.3 0.00012785 0.42 AML other m 2021-11-12T11:16:40.97
IV.FDMO.HHN. ML:1.6 0.000189 0.34 AML other m 2021-11-12T11:16:41.20
IV.LNSS.HHE. ML:2 0.000452 0.56 AML other m 2021-11-12T11:16:41.10
IV.FDMO.HHE. ML:1.7 0.000227 0.6 AML other m 2021-11-12T11:16:41.25
IV.ARRO.EHN. ML:1.6 0.000184 1.84 AML other m 2021-11-12T11:16:41.04
IV.LNSS.HHN. ML:2.1 0.0006685 0.82 AML other m 2021-11-12T11:16:42.57
IV.ARRO.EHE. ML:1.6 0.0001875 0.58 AML other m 2021-11-12T11:16:42.61
IV.MML1.EHN. ML:1.7 0.000213 0.74 AML other m 2021-11-12T11:16:42.52
IV.MML1.EHE. ML:1.8 0.0002565 0.12 AML other m 2021-11-12T11:16:42.66
IV.MOMA.HHN. ML:1.4 0.000135 0.3 AML other m 2021-11-12T11:16:42.55
IV.ASSB.HHN. ML:1.4 0.0001162 0.48 AML other m 2021-11-12T11:16:42.72
IV.ASSB.HHE. ML:1.5 0.0001435 0.16 AML other m 2021-11-12T11:16:44.76
IV.CSP1.EHN. ML:2.1 0.000428 1.12 AML other m 2021-11-12T11:16:46.58
IV.ATCC.EHE. ML:1.7 0.000153 0.22 AML other m 2021-11-12T11:16:46.27
IV.GUMA.HHN. ML:2 0.00031 0.22 AML other m 2021-11-12T11:16:46.51
IV.CSP1.EHE. ML:2 0.000347 0.22 AML other m 2021-11-12T11:16:46.94
IV.SNTG.HHN. ML:1.5 9.46E-5 0.26 AML other m 2021-11-12T11:16:46.97
IV.ATCC.EHN. ML:1.6 0.000118 1.3 AML other m 2021-11-12T11:16:47.74
IV.SNTG.HHE. ML:1.5 8.205E-5 0.9 AML other m 2021-11-12T11:16:47.67
IV.MF5.EHN. ML:1.7 0.000116825 1.18 AML other m 2021-11-12T11:16:48.88
IV.MF5.EHE. ML:1.7 0.00013 0.18 AML other m 2021-11-12T11:16:49.11
IV.GUMA.HHE. ML:2 0.000268 0.48 AML other m 2021-11-12T11:16:49.26
IV.EL6.EHN. ML:1.9 0.0001645 0.14 AML other m 2021-11-12T11:16:50.19
IV.EL6.EHE. ML:2 0.00022 0.14 AML other m 2021-11-12T11:16:50.21
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