Earthquake with magnitude of ML 1.5 on date 19-10-2021 and time 08:57:39 (Italy) in region 6 km SW Castel Ritaldi (PG)

A magnitude ML 1.5 earthquake occured in region: 6 km SW Castel Ritaldi (PG), on

  • 19-10-2021 06:57:39 (UTC)
  • 19-10-2021 08:57:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.779, 12.63 at 8 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
Castel Ritaldi PG 6 3278 3278
Giano dell'Umbria PG 8 3846 7124
Massa Martana PG 9 3770 10894
Spoleto PG 10 38218 49112
Acquasparta TR 12 4778 53890
Campello sul Clitunno PG 13 2442 56332
Montefalco PG 13 5679 62011
Trevi PG 15 8469 70480
Gualdo Cattaneo PG 16 6155 76635
Bevagna PG 17 5081 81716
Sant'Anatolia di Narco PG 18 564 82280
Scheggino PG 18 461 82741
Todi PG 18 16851 99592
Montecastrilli TR 18 5022 104614
Vallo di Nera PG 19 364 104978
San Gemini TR 20 5018 109996

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Foligno (57155 inhabitants)
24 Km N of Terni (111501 inhabitants)
42 Km SE of Perugia (166134 inhabitants)
59 Km NE of Viterbo (67173 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
87 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km W of Teramo (54892 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
98 Km SE of Arezzo (99543 inhabitants)
99 Km N of Roma (2864731 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 1.5 2021-10-19
06:57:39
42.7793 12.6303 8 2021-10-19
07:08:04
Sala Sismica INGV-Roma 96753961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 06:57:39 ± 0.05
Latitude 42.7793 ± 0.0027
Longitude 12.6303 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96753961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 323
Semi-minor axis of confidence ellipse (meter) 204
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.64841
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 27
Type of magnitude ML
Reference to an origin 96753961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 07:08:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SACS.HHZ. 2021-10-19T06:57:52.47 3.0 undecidable manual P 2.05 0
IV.EL6.EHZ. 2021-10-19T06:57:52.19 0.6 undecidable manual P 32 0.6484 50 0.09 44
IV.CESI.HHZ. 2021-10-19T06:57:51.13 0.3 undecidable manual S 42 0.3022 104 -0.05 71
IV.SNTG.HHN. 2021-10-19T06:57:50.12 0.3 undecidable manual P 25 0.527 50 0.1 67
IV.CSP1.EHZ. 2021-10-19T06:57:50.01 0.6 undecidable manual P 53 0.5234 50 0.05 45
IV.ATVA.EHE. 2021-10-19T06:57:50.71 0.3 undecidable manual P 333 0.5594 50 0.14 66
IV.ASSB.HHZ. 2021-10-19T06:57:49.78 0.3 undecidable manual S 5 0.2644 106 0.01 72
IV.MURB.HHE. 2021-10-19T06:57:49.24 0.3 undecidable manual P 351 0.4892 50 -0.14 67
IV.MGAB.HHZ. 2021-10-19T06:57:48.00 0.3 undecidable manual P 290 0.402 50 0.11 69
IV.ATCC.EHN. 2021-10-19T06:57:48.33 0.6 undecidable manual P 1 0.4056 50 0.38 43
IV.FDMO.HHZ. 2021-10-19T06:57:48.32 0.6 undecidable manual P 52 0.4218 50 0.1 46
IV.ARRO.EHZ. 2021-10-19T06:57:48.53 0.3 undecidable manual S 154 0.223 108 0.26 69
IV.MML1.EHZ. 2021-10-19T06:57:48.05 0.6 undecidable manual P 37 0.4173 50 -0.09 46
IV.GAVE.EHZ. 2021-10-19T06:57:47.78 0.3 undecidable manual S 114 0.2122 109 -0.09 72
IV.LNSS.HHZ. 2021-10-19T06:57:46.58 0.3 undecidable manual P 120 0.3489 50 -0.4 66
IV.CESX.HHZ. 2021-10-19T06:57:46.33 0.3 undecidable manual S 191 0.1736 113 -0.15 71
IV.NRCA.HHZ. 2021-10-19T06:57:46.81 0.3 undecidable manual P 81 0.3588 50 -0.34 66
IV.ASSB.HHZ. 2021-10-19T06:57:45.33 0.3 undecidable manual P 5 0.2644 106 0.02 72
IV.CESI.HHZ. 2021-10-19T06:57:45.97 0.3 undecidable manual P 42 0.3022 104 -0.16 70
IV.GAVE.EHZ. 2021-10-19T06:57:44.65 0.3 undecidable manual P 114 0.2122 109 0.44 67
IV.ARRO.EHZ. 2021-10-19T06:57:44.67 0.3 undecidable manual P 154 0.223 108 0.22 70
IV.CESX.HHZ. 2021-10-19T06:57:43.19 0.3 undecidable manual P 191 0.1736 113 -0.22 70
IV.MOMA.HHZ. 2021-10-19T06:57:42.68 0.1 undecidable manual S 299 0.0504 146 0.03 100
IT.GNU.HGE. 2021-10-19T06:57:42.49 0.3 undecidable manual S 299 0.0504 146 -0.16 73
IV.MOMA.HHZ. 2021-10-19T06:57:41.23 0.1 undecidable manual P 299 0.0504 146 0.03 100
IT.GNU.HGE. 2021-10-19T06:57:41.21 0.3 undecidable manual P 299 0.0504 146 0.01 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:2.1 0.002625 0.12 AML other m 2021-10-19T06:57:42.88
IV.MOMA.HHN. ML:2.2 0.002807711 0.1216 AML other m 2021-10-19T06:57:42.88
IV.MOMA.HHE. ML:2.4 0.0043287375 0.1408 AML other m 2021-10-19T06:57:43.07
IV.MOMA.HNE. ML:2.3 0.00398 0.14 AML other m 2021-10-19T06:57:43.07
IV.GAVE.EHN. ML:1.5 0.0002045 0.18 AML other m 2021-10-19T06:57:48.81
IV.ARRO.EHN. ML:1.3 0.00011675815 0.1984 AML other m 2021-10-19T06:57:49.31
IV.ARRO.EHE. ML:1.4 0.0001615 0.22 AML other m 2021-10-19T06:57:49.62
IV.GAVE.EHE. ML:1.6 0.0002665 0.24 AML other m 2021-10-19T06:57:49.70
IV.ASSB.HHN. ML:1.4 0.0001235 0.16 AML other m 2021-10-19T06:57:50.48
IV.ASSB.HHE. ML:1.3 0.0001102359 0.1792 AML other m 2021-10-19T06:57:50.61
IV.CESI.HHE. ML:1.2 6.731754E-5 0.24 AML other m 2021-10-19T06:57:52.23
IV.CESI.HHN. ML:1.4 0.00010065 0.62 AML other m 2021-10-19T06:57:52.53
IV.LNSS.HHE. ML:1.6 0.000131 1.4 AML other m 2021-10-19T06:57:54.24
IV.LNSS.HHN. ML:1.5 0.00011249741 0.1792 AML other m 2021-10-19T06:57:55.14
IV.NRCA.HHN. ML:1.4 9.495E-5 0.12 AML other m 2021-10-19T06:57:55.13
IV.MGAB.HHE. ML:1.6 0.00011875 0.56 AML other m 2021-10-19T06:57:55.18
IV.MML1.EHE. ML:1.3 5.9638005E-5 0.1792 AML other m 2021-10-19T06:57:56.42
IV.NRCA.HHE. ML:1.4 9.661715E-5 0.1792 AML other m 2021-10-19T06:57:55.88
IV.MGAB.HHN. ML:1.5 9.665E-5 0.18 AML other m 2021-10-19T06:57:56.61
IV.MML1.EHN. ML:1.1 3.887748E-5 0.4608 AML other m 2021-10-19T06:58:02.38
IV.CSP1.EHN. ML:1.8 0.00012427084 0.3616 AML other m 2021-10-19T06:57:59.02
IV.CSP1.EHE. ML:1.8 0.000119631 0.2432 AML other m 2021-10-19T06:57:59.14
IV.GAVE.HNE. ML:1.6 0.0002384199 0.2304 AML other m 2021-10-19T06:57:49.69
IV.CESI.HNE. ML:1.4 0.000105694835 0.4192 AML other m 2021-10-19T06:57:53.92
IV.CESI.HNN. ML:1.4 0.00011748555 0.1792 AML other m 2021-10-19T06:57:53.44
IV.NRCA.HNE. ML:1.5 0.00011387982 0.3488 AML other m 2021-10-19T06:57:53.28
IV.MGAB.HNE. ML:1.6 0.000129431745 0.4896 AML other m 2021-10-19T06:57:55.94
IV.FDMO.HHE. ML:1.3 5.430195E-5 0.16 AML other m 2021-10-19T06:57:55.87
IV.FDMO.HHN. ML:1.2 5.165851E-5 0.1408 AML other m 2021-10-19T06:57:56.18
IV.EL6.EHE. ML:1.8 0.000100096225 0.2208 AML other m 2021-10-19T06:58:03.54
IV.EL6.EHN. ML:1.5 4.91571005E-5 0.2592 AML other m 2021-10-19T06:58:03.81
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