Earthquake with magnitude of ML 0.9 on date 20-09-2021 and time 21:22:19 (Italy) in region 7 km NE Campello sul Clitunno (PG)

A magnitude ML 0.9 earthquake occured in region: 7 km NE Campello sul Clitunno (PG), on

  • 20-09-2021 19:22:19 (UTC)
  • 20-09-2021 21:22:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.865, 12.843 at 16 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
Campello sul Clitunno PG 7 2442 2442
Sellano PG 8 1079 3521
Cerreto di Spoleto PG 8 1075 4596
Trevi PG 8 8469 13065
Vallo di Nera PG 11 364 13429
Sant'Anatolia di Narco PG 15 564 13993
Castel Ritaldi PG 15 3278 17271
Foligno PG 15 57155 74426
Montefalco PG 16 5679 80105
Preci PG 16 724 80829
Spoleto PG 17 38218 119047
Scheggino PG 17 461 119508
Poggiodomo PG 19 117 119625
Monte Cavallo MC 19 145 119770
Spello PG 20 8645 128415

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SE of Foligno (57155 inhabitants)
37 Km NE of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
74 Km W of Teramo (54892 inhabitants)
78 Km NE of Viterbo (67173 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km SW of Ancona (100861 inhabitants)
100 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-09-20
19:22:19
42.8648 12.8428 16 2021-09-20
19:26:56
Sala Sismica INGV-Roma 95673921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 19:22:19 ± 0.18
Latitude 42.8648 ± 0.0045
Longitude 12.8428 ± 0.0061
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95673921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 519
Semi-minor axis of confidence ellipse (meter) 257
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 268
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24821
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0
Num. used stations 4
Type of magnitude ML
Reference to an origin 95673921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 19:26:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-09-20T19:23:39.82 3.0 undecidable manual Sg 11.64 0
IV.MSSA.HHZ. 2021-09-20T19:23:21.59 3.0 positive manual Pg 17.620001 0
IV.SARZ.HHZ. 2021-09-20T19:23:18.31 3.0 positive manual Pn 6.06 0
GU.ROTM.HHZ. 2021-09-20T19:23:18.19 3.0 undecidable manual Pn 0.93 0
IV.CADC.EHZ. 2021-09-20T19:23:15.42 3.0 negative manual Pg 9.73 0
IV.ESCV.HHZ. 2021-09-20T19:23:06.32 3.0 negative manual Pg 2.15 0
IV.PTCC.HHZ. 2021-09-20T19:22:52.61 3.0 undecidable manual Pg -2.87 0
IV.SBPO.HNZ. 2021-09-20T19:22:47.10 3.0 undecidable manual Pn -9.11 0
IV.PTRJ.HNZ. 2021-09-20T19:22:47.29 3.0 undecidable manual Sg 8.04 0
IX.MNT3.EHZ.02 2021-09-20T19:22:44.49 3.0 undecidable manual Sn -2.64 0
IV.VIVA.HHZ. 2021-09-20T19:22:35.02 3.0 positive manual Pg 5.69 0
IV.LPEL.HHZ. 2021-09-20T19:22:34.47 3.0 undecidable manual Sn 1.2 0
IV.TST02.HHZ. 2021-09-20T19:22:30.50 3.0 undecidable manual S -0.52 0
IV.FDMO.HHZ. 2021-09-20T19:22:29.37 0.6 undecidable manual S 46 0.2482 107 -0.03 49
IV.ASSB.HHZ. 2021-09-20T19:22:28.41 0.6 undecidable manual S 323 0.223 110 -0.29 49
IV.MOMA.HHZ. 2021-09-20T19:22:28.51 0.6 undecidable manual S 253 0.2086 112 0.2 48
IV.GAVE.EHZ. 2021-09-20T19:22:27.28 0.6 undecidable manual S 168 0.1763 118 -0.16 48
IV.CESI.HHZ. 2021-09-20T19:22:26.66 0.6 undecidable manual S 18 0.1475 124 -0.03 51
IV.FDMO.HHZ. 2021-09-20T19:22:25.58 1.0 undecidable manual P 46 0.2482 107 0.41 24
IV.ASSB.HHZ. 2021-09-20T19:22:24.67 0.3 negative manual P 323 0.223 110 -0.09 74
IV.MOMA.HHZ. 2021-09-20T19:22:24.76 0.6 positive manual P 253 0.2086 112 0.22 49
IV.GAVE.EHZ. 2021-09-20T19:22:24.12 1.0 undecidable manual P 168 0.1763 118 0.08 25
IV.MTMR.EHZ. 2021-09-20T19:22:23.79 3.0 undecidable manual Pg 2.67 0
IV.CESI.HHZ. 2021-09-20T19:22:23.75 0.1 positive manual P 18 0.1475 124 0.15 100
OT.OT17.EHZ. 2021-09-20T19:22:04.99 3.0 undecidable manual P -3.78 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.8 5.22E-5 0.26 AML other m 2021-09-20T19:22:26.76
IV.CESI.HHN. ML:0.9 5.385E-5 0.14 AML other m 2021-09-20T19:22:26.87
IV.GAVE.EHN. ML:0.9 5.01E-5 0.2 AML other m 2021-09-20T19:22:27.82
IV.GAVE.EHE. ML:0.8 4.425E-5 0.18 AML other m 2021-09-20T19:22:28.43
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