Earthquake with magnitude of ML 1.0 on date 19-10-2021 and time 03:45:26 (Italy) in region 3 km E Cerreto di Spoleto (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km E Cerreto di Spoleto (PG), on

  • 19-10-2021 01:45:26 (UTC)
  • 19-10-2021 03:45:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.824, 12.951 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 3 1075 1075
Sellano PG 8 1079 2154
Vallo di Nera PG 9 364 2518
Preci PG 10 724 3242
Norcia PG 12 4957 8199
Poggiodomo PG 12 117 8316
Cascia PG 13 3217 11533
Sant'Anatolia di Narco PG 14 564 12097
Campello sul Clitunno PG 14 2442 14539
Scheggino PG 16 461 15000
Visso MC 16 1107 16107
Trevi PG 18 8469 24576
Castelsantangelo sul Nera MC 18 281 24857
Monteleone di Spoleto PG 19 599 25456
Monte Cavallo MC 19 145 25601
Spoleto PG 20 38218 63819

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
56 Km SE of Perugia (166134 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
64 Km W of Teramo (54892 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
100 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 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 1.0 2021-10-19
01:45:26
42.8238 12.9512 11 2021-10-19
02:01:46
Sala Sismica INGV-Roma 96745921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 01:45:26 ± 0.04
Latitude 42.8238 ± 0.0018
Longitude 12.9512 ± 0.0037
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 96745921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 281
Semi-minor axis of confidence ellipse (meter) 170
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 109
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.11961
Epicentral distance of station farthest from the epicenter (degree) 0.32555
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 96745921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 02:01:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-10-19T01:45:37.16 0.3 undecidable manual S 75 0.2851 50 0.09 72
IV.LNSS.HHZ. 2021-10-19T01:45:35.46 0.3 undecidable manual S 163 0.2302 50 0.02 74
IV.FDMO.HHZ. 2021-10-19T01:45:35.54 0.3 undecidable manual S 25 0.2347 50 -0.02 74
IV.CESI.HHZ. 2021-10-19T01:45:34.05 0.3 undecidable manual S 349 0.1844 50 -0.01 75
IV.CSP1.EHZ. 2021-10-19T01:45:33.10 0.1 undecidable manual P 35 0.3256 50 -0.03 97
IV.MMO1.EHZ. 2021-10-19T01:45:32.43 0.1 undecidable manual P 75 0.2851 50 0 98
IV.MML1.EHZ. 2021-10-19T01:45:32.51 0.1 undecidable manual P 3 0.2896 50 0 98
IV.GAVE.EHZ. 2021-10-19T01:45:32.52 0.3 undecidable manual S 198 0.1385 125 -0.11 74
IV.NRCA.HHZ. 2021-10-19T01:45:31.91 0.3 undecidable manual S 85 0.1196 129 -0.16 74
IV.LNSS.HHZ. 2021-10-19T01:45:31.39 0.1 undecidable manual P 163 0.2302 50 -0.1 97
IV.FDMO.HHZ. 2021-10-19T01:45:31.54 0.6 positive manual P 25 0.2347 50 -0.03 49
IV.GAVE.EHZ. 2021-10-19T01:45:30.02 0.1 positive manual P 198 0.1385 125 0.15 98
IV.CESI.HHZ. 2021-10-19T01:45:30.69 0.1 undecidable manual P 349 0.1844 50 -0.01 100
IV.NRCA.HHZ. 2021-10-19T01:45:29.75 0.3 negative manual P 85 0.1196 129 0.2 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1 9.4411755E-5 0.06 AML other m 2021-10-19T01:45:32.14
IV.NRCA.HHN. ML:1 8.8752115E-5 0.08 AML other m 2021-10-19T01:45:32.07
IV.GAVE.EHE. ML:1.2 0.000148 0.16 AML other m 2021-10-19T01:45:32.92
IV.GAVE.EHN. ML:1 0.00010217514 0.14 AML other m 2021-10-19T01:45:32.81
IV.NRCA.HNE. ML:0.9 8.7103615E-5 0.38 AML other m 2021-10-19T01:45:31.56
IV.NRCA.HNN. ML:1.2 0.0001522135 0.7304 AML other m 2021-10-19T01:45:30.42
IV.GAVE.HNE. ML:1.2 0.00015656165 0.2096 AML other m 2021-10-19T01:45:33.02
IV.GAVE.HNN. ML:1.3 0.00016345025 0.9104 AML other m 2021-10-19T01:45:32.51
IV.CESI.HHE. ML:0.3 1.29393805E-5 0.14 AML other m 2021-10-19T01:45:34.66
IV.CESI.HHN. ML:0.6 2.5813925E-5 0.18 AML other m 2021-10-19T01:45:34.20
IV.CESI.HNE. ML:1.1 8.506788E-5 0.4896 AML other m 2021-10-19T01:45:42.22
IV.CESI.HNN. ML:1.3 0.00015624425 0.6696 AML other m 2021-10-19T01:45:31.49
IV.LNSS.HHE. ML:0.8 3.5751225E-5 0.14 AML other m 2021-10-19T01:45:35.65
IV.LNSS.HHN. ML:0.8 3.594592E-5 0.24 AML other m 2021-10-19T01:45:35.81
IV.LNSS.HNE. ML:1.2 9.906938E-5 0.6104 AML other m 2021-10-19T01:45:30.91
IV.LNSS.HNN. ML:1.6 0.00023261485 1.0296 AML other m 2021-10-19T01:45:31.08
IV.FDMO.HHE. ML:0.6 2.419651E-5 0.14 AML other m 2021-10-19T01:45:36.28
IV.FDMO.HHN. ML:0.6 2.327101E-5 0.14 AML other m 2021-10-19T01:45:35.73
IV.MML1.EHE. ML:0.5 1.3560975E-5 0.14 AML other m 2021-10-19T01:45:37.72
IV.MML1.EHN. ML:0.5 1.312438E-5 0.18 AML other m 2021-10-19T01:45:38.26
IV.MML1.HNE. ML:1.2 7.1408875E-5 0.72 AML other m 2021-10-19T01:45:37.95
IV.MML1.HNN. ML:1.6 0.00015261144 0.8992 AML other m 2021-10-19T01:45:38.54
IV.CSP1.EHE. ML:1.1 4.607075005E-5 0.78 AML other m 2021-10-19T01:45:51.84
IV.CSP1.EHN. ML:0.8 2.74319245E-5 0.38 AML other m 2021-10-19T01:45:39.83
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