Earthquake with magnitude of ML 0.8 on date 19-09-2021 and time 07:07:18 (Italy) in region 4 km E Cerreto di Spoleto (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km E Cerreto di Spoleto (PG), on

  • 19-09-2021 05:07:18 (UTC)
  • 19-09-2021 07:07:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.829, 12.966 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
Sellano PG 7 1079 2154
Preci PG 8 724 2878
Vallo di Nera PG 11 364 3242
Norcia PG 11 4957 8199
Cascia PG 13 3217 11416
Poggiodomo PG 13 117 11533
Sant'Anatolia di Narco PG 15 564 12097
Visso MC 15 1107 13204
Campello sul Clitunno PG 15 2442 15646
Scheggino PG 17 461 16107
Castelsantangelo sul Nera MC 17 281 16388
Trevi PG 19 8469 24857
Monte Cavallo MC 19 145 25002
Ussita MC 19 444 25446
Monteleone di Spoleto PG 20 599 26045

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
56 Km SE of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
99 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 0.8 2021-09-19
05:07:18
42.8292 12.966 11 2021-09-19
05:11:18
Sala Sismica INGV-Roma 95615621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-19 05:07:18 ± 0.04
Latitude 42.8292 ± 0.0018
Longitude 12.9660 ± 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 95615621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 246
Semi-minor axis of confidence ellipse (meter) 225
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.10882
Epicentral distance of station farthest from the epicenter (degree) 0.28419
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 95615621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-19 05:11:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-09-19T05:07:29.22 0.3 undecidable manual S 75 0.2734 50 -0.08 72
IV.MML1.EHZ. 2021-09-19T05:07:29.68 0.3 undecidable manual S 1 0.2842 50 0.06 72
IV.FDMO.HHZ. 2021-09-19T05:07:27.80 0.1 undecidable manual S 23 0.2257 50 -0.07 97
IV.CESI.HHZ. 2021-09-19T05:07:26.39 0.1 undecidable manual S 346 0.1817 118 -0.11 98
IV.GAVE.EHZ. 2021-09-19T05:07:25.24 0.1 undecidable manual S 201 0.1466 123 -0.11 98
IV.MML1.EHZ. 2021-09-19T05:07:25.05 0.1 undecidable manual P 1 0.2842 50 0.08 96
IV.NRCA.HHZ. 2021-09-19T05:07:24.12 0.1 undecidable manual S 88 0.1088 131 -0.06 100
IV.MMO1.EHZ. 2021-09-19T05:07:24.76 0.1 undecidable manual P 75 0.2734 50 -0.02 98
IV.CESI.HHZ. 2021-09-19T05:07:23.23 0.1 undecidable manual P 346 0.1817 118 0.06 98
IV.FDMO.HHZ. 2021-09-19T05:07:23.95 0.1 undecidable manual P 23 0.2257 50 -0.01 99
IV.NRCA.HHZ. 2021-09-19T05:07:22.02 0.1 undecidable manual P 88 0.1088 131 0.19 97
IV.GAVE.EHZ. 2021-09-19T05:07:22.56 0.1 positive manual P 201 0.1466 123 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.9 8.59E-5 0.06 AML other m 2021-09-19T05:07:24.33
IV.NRCA.HHE. ML:0.9 8.83E-5 0.16 AML other m 2021-09-19T05:07:24.27
IV.GAVE.EHE. ML:0.9 6.28E-5 0.74 AML other m 2021-09-19T05:07:25.40
IV.GAVE.EHN. ML:0.6 3.655E-5 1.36 AML other m 2021-09-19T05:07:25.98
IV.CESI.HHN. ML:0.8 4.58E-5 0.38 AML other m 2021-09-19T05:07:26.74
IV.CESI.HHE. ML:0.6 3.0E-5 1 AML other m 2021-09-19T05:07:26.84
IV.FDMO.HHN. ML:0.9 4.265E-5 0.14 AML other m 2021-09-19T05:07:28.00
IV.FDMO.HHE. ML:0.9 4.975E-5 1.78 AML other m 2021-09-19T05:07:28.99
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