Earthquake with magnitude of ML 1.0 on date 07-03-2021 and time 12:40:40 (UTC) in region 4 km SW Preci (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km SW Preci (PG), on

  • 07-03-2021 12:40:40 (UTC)
  • 07-03-2021 13:40:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.85, 13.02 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
Preci PG 4 724 724
Sellano PG 8 1079 1803
Cerreto di Spoleto PG 9 1075 2878
Norcia PG 9 4957 7835
Visso MC 11 1107 8942
Castelsantangelo sul Nera MC 12 281 9223
Ussita MC 14 444 9667
Cascia PG 15 3217 12884
Vallo di Nera PG 16 364 13248
Monte Cavallo MC 16 145 13393
Poggiodomo PG 17 117 13510
Campello sul Clitunno PG 20 2442 15952
Sant'Anatolia di Narco PG 20 564 16516

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
58 Km E of Perugia (166134 inhabitants)
60 Km W of Teramo (54892 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
98 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 2021-03-07
12:40:40
42.85 13.01 11 2021-03-07
12:49:36
Sala Sismica INGV-Roma 87870431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-07 12:40:40 ± 0.05
Latitude 42.85 ± 0.00
Longitude 13.01 ± 0.00
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 87870431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 168
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.27519
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 87870431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-07 12:49:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MML1.HNZ. 2021-03-07T12:40:51.04 0.1 undecidable manual S 353 0.2617 50 0.08 99
IV.CSP1.EHZ. 2021-03-07T12:40:51.66 0.3 undecidable manual S 30 0.2752 50 0.28 71
IV.MMO1.EHZ. 2021-03-07T12:40:50.04 0.3 undecidable manual S 79 0.2329 50 -0.08 75
IV.LNSS.HHZ. 2021-03-07T12:40:50.74 0.3 undecidable manual S 176 0.2518 50 0.08 75
IV.GAVE.EHZ. 2021-03-07T12:40:48.70 0.3 undecidable manual S 209 0.1844 50 0.03 76
IV.CESI.HHZ. 2021-03-07T12:40:48.24 0.3 undecidable manual S 332 0.1709 50 -0.05 76
IV.FDMO.HHZ. 2021-03-07T12:40:48.67 0.3 undecidable manual S 16 0.1898 50 -0.17 74
IV.MC2.EHZ. 2021-03-07T12:40:47.49 0.3 undecidable manual S 66 0.1403 50 0.13 75
IV.LNSS.HHZ. 2021-03-07T12:40:46.39 0.1 undecidable manual P 176 0.2518 50 -0.08 99
IV.MML1.HNZ. 2021-03-07T12:40:46.61 0.1 undecidable manual P 353 0.2617 50 -0.03 100
IV.MMO1.EHZ. 2021-03-07T12:40:46.08 0.6 undecidable manual P 79 0.2329 50 -0.08 50
IV.CSP1.EHZ. 2021-03-07T12:40:46.76 0.6 positive manual P 30 0.2752 50 -0.12 49
IV.NRCA.HHZ. 2021-03-07T12:40:45.43 0.3 undecidable manual S 105 0.0755 143 -0.13 76
IV.FDMO.HHZ. 2021-03-07T12:40:45.31 0.3 positive manual P 16 0.1898 50 -0.11 75
IV.GAVE.EHZ. 2021-03-07T12:40:45.45 0.6 positive manual P 209 0.1844 50 0.13 50
IV.CESI.HHZ. 2021-03-07T12:40:45.09 1.0 negative manual P 332 0.1709 50 -0.01 26
IV.MC2.EHZ. 2021-03-07T12:40:44.67 0.6 undecidable manual P 66 0.1403 50 0.11 50
IV.NRCA.HHZ. 2021-03-07T12:40:43.58 0.6 undecidable manual P 105 0.0755 143 0.05 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.0002 0.08 AML other m 2021-03-07T12:40:45.49
IV.NRCA.HHE. ML:1 0.0001195 0.08 AML other m 2021-03-07T12:40:45.77
IV.CESI.HHN. ML:0.4 2.225E-5 0.86 AML other m 2021-03-07T12:40:47.35
IV.CESI.HHE. ML:0.4 2.06E-5 0.16 AML other m 2021-03-07T12:40:48.39
IV.GAVE.EHE. ML:1.2 0.0001195 1.66 AML other m 2021-03-07T12:40:49.09
IV.GAVE.EHN. ML:1.1 8.8E-5 0.48 AML other m 2021-03-07T12:40:49.28
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download