Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 05-03-2021 and time 19:58:49 (Italy) in region 3 km E Spoleto (PG)

A magnitude ML 1.8 earthquake occured in region: 3 km E Spoleto (PG), on

  • 05-03-2021 18:58:49 (UTC)
  • 05-03-2021 19:58:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.74, 12.77 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Spoleto PG 3 38218 38218
Sant'Anatolia di Narco PG 5 564 38782
Scheggino PG 6 461 39243
Vallo di Nera PG 8 364 39607
Campello sul Clitunno PG 9 2442 42049
Castel Ritaldi PG 13 3278 45327
Ferentillo TR 13 1913 47240
Poggiodomo PG 14 117 47357
Cerreto di Spoleto PG 15 1075 48432
Montefranco TR 16 1276 49708
Trevi PG 16 8469 58177
Arrone TR 17 2763 60940
Monteleone di Spoleto PG 18 599 61539
Polino TR 18 233 61772
Giano dell'Umbria PG 19 3846 65618
Acquasparta TR 19 4778 70396
Cascia PG 20 3217 73613
Montefalco PG 20 5679 79292

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Terni (111501 inhabitants)
25 Km S of Foligno (57155 inhabitants)
52 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
67 Km NW of L'Aquila (69753 inhabitants)
77 Km W of Teramo (54892 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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 1.8 2021-03-05
18:58:49		 42.74 12.77 9 2021-03-05
19:12:00		 Sala Sismica INGV-Roma 87791191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-05 18:58:49 ± 0.08
Latitude 42.74 ± 0.01
Longitude 12.77 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87791191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 584
Semi-minor axis of confidence ellipse (meter) 430
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.81568
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 23
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 46
Type of magnitude ML
Reference to an origin 87791191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-05 19:12:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TRIF.CHZ. 2021-03-05T18:59:36.51 3.0 undecidable manual S 0.89 0
IV.SSFR.HHZ. 2021-03-05T18:59:13.60 0.1 undecidable manual S 1 0.6979 50 0.63 78
IV.EL6.EHZ. 2021-03-05T18:59:11.85 0.1 undecidable manual S 22 0.6376 50 0.66 78
IV.TERO.HHZ. 2021-03-05T18:59:10.83 0.6 undecidable manual S 100 0.6214 50 0.12 45
IV.SAP2.EHZ. 2021-03-05T18:59:10.21 3.0 undecidable manual S 0.15 0
IV.LRP.EHZ. 2021-03-05T18:59:10.82 3.0 undecidable manual P -1.87 0
IV.SRES.HHZ. 2021-03-05T18:59:09.25 3.0 undecidable manual S -0.58 0
IV.MF5.EHZ. 2021-03-05T18:59:09.97 0.1 undecidable manual S 63 0.5612 50 1.03 67
IV.GUMA.HHZ. 2021-03-05T18:59:08.69 0.1 undecidable manual S 52 0.5243 50 0.87 73
IV.FIAM.HHZ. 2021-03-05T18:59:08.40 0.3 undecidable manual S 152 0.5342 50 0.28 67
IV.CAMP.HHZ. 2021-03-05T18:59:07.44 0.1 undecidable manual S 113 0.5099 50 0.04 94
IV.MGAB.HHZ. 2021-03-05T18:59:07.90 0.1 undecidable manual S 290 0.5144 50 0.35 88
IV.ATCC.EHZ. 2021-03-05T18:59:06.09 0.3 undecidable manual S 348 0.4569 50 0.25 68
IV.CSP1.EHZ. 2021-03-05T18:59:06.48 0.1 undecidable manual S 42 0.4739 50 0.13 93
IV.MMO1.EHZ. 2021-03-05T18:59:05.04 0.1 undecidable manual S 68 0.4371 50 -0.2 92
IV.SMA1.EHZ. 2021-03-05T18:59:05.61 0.3 undecidable manual S 104 0.4272 50 0.66 61
IV.RM33.EHZ. 2021-03-05T18:59:04.03 0.1 undecidable manual S 125 0.3975 50 -0.04 96
IV.PIEI.HHZ. 2021-03-05T18:59:04.96 0.1 undecidable manual P 348 0.8157 50 -0.08 87
IV.FDMO.HHZ. 2021-03-05T18:59:03.23 0.1 undecidable manual S 38 0.3768 50 -0.23 93
IV.SSFR.HHZ. 2021-03-05T18:59:02.89 0.1 negative manual P 1 0.6979 50 -0.13 89
IV.MC2.EHZ. 2021-03-05T18:59:02.79 0.1 undecidable manual S 60 0.3507 50 0.1 96
IV.TERO.HHZ. 2021-03-05T18:59:01.36 0.1 undecidable manual P 100 0.6214 50 -0.36 86
IV.EL6.EHZ. 2021-03-05T18:59:01.79 0.6 positive manual P 22 0.6376 50 -0.21 44
IV.MF5.EHZ. 2021-03-05T18:59:00.92 0.1 undecidable manual P 63 0.5612 50 0.23 89
IV.CESI.HHZ. 2021-03-05T18:59:00.20 0.1 undecidable manual S 20 0.2833 50 -0.49 89
IV.GUMA.HHZ. 2021-03-05T18:59:00.15 0.3 undecidable manual P 52 0.5243 50 0.1 69
IV.FOSV.EHZ. 2021-03-05T18:59:00.29 3.0 undecidable manual P -0.38 0
IV.MGAB.HHZ. 2021-03-05T18:58:59.90 0.3 positive manual P 290 0.5144 50 0 71
IV.NRCA.HHZ. 2021-03-05T18:58:59.69 0.1 undecidable manual S 69 0.268 50 -0.55 88
IV.SMA1.EHZ. 2021-03-05T18:58:58.16 1.0 undecidable manual P 104 0.4272 50 -0.24 23
IV.LNSS.HHZ. 2021-03-05T18:58:58.94 0.1 undecidable manual S 124 0.2383 109 -0.23 95
IV.MMO1.EHZ. 2021-03-05T18:58:58.22 0.6 negative manual P 68 0.4371 50 -0.34 45
IV.ATCC.EHZ. 2021-03-05T18:58:58.61 0.6 negative manual P 348 0.4569 50 -0.3 45
IV.CSP1.EHZ. 2021-03-05T18:58:58.82 0.1 positive manual P 42 0.4739 50 -0.38 88
IV.CESX.HHZ. 2021-03-05T18:58:57.31 0.1 undecidable manual S 227 0.1889 114 -0.07 99
IV.FDMO.HHZ. 2021-03-05T18:58:57.05 0.3 positive manual P 38 0.3768 50 -0.48 66
IV.RM33.EHZ. 2021-03-05T18:58:57.47 0.3 negative manual P 125 0.3975 50 -0.42 66
IV.MC2.EHZ. 2021-03-05T18:58:56.79 1.0 undecidable manual P 60 0.3507 50 -0.3 23
IV.FIAM.HHZ. 2021-03-05T18:58:56.72 0.3 undecidable manual P 152 0.5342 50 -3.51 3
IV.MOMA.HHZ. 2021-03-05T18:58:56.60 0.1 undecidable manual S 294 0.1628 117 0.12 99
IV.ARRO.EHZ. 2021-03-05T18:58:56.72 0.1 undecidable manual S 182 0.1592 118 0.36 94
IV.GAVE.EHZ. 2021-03-05T18:58:55.00 0.1 undecidable manual S 117 0.0998 130 0.54 91
IV.NRCA.HHZ. 2021-03-05T18:58:55.20 0.1 positive manual P 69 0.268 50 -0.47 90
IV.CESI.HHZ. 2021-03-05T18:58:54.86 0.3 undecidable manual P 20 0.2833 50 -1.08 52
IV.LNSS.HHZ. 2021-03-05T18:58:54.80 0.1 negative manual P 124 0.2383 109 -0.26 95
IV.CAMP.HHZ. 2021-03-05T18:58:54.89 0.3 undecidable manual P 113 0.5099 50 -4.91 3
IV.ARRO.EHZ. 2021-03-05T18:58:53.60 0.3 negative manual P 182 0.1592 118 0.17 73
IV.CESX.HHZ. 2021-03-05T18:58:53.87 0.1 positive manual P 227 0.1889 114 -0.16 98
IV.MOMA.HHZ. 2021-03-05T18:58:53.44 0.1 negative manual P 294 0.1628 117 -0.06 100
IV.GAVE.EHZ. 2021-03-05T18:58:52.55 0.1 negative manual P 117 0.0998 130 0.21 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNN. ML:1.7 0.000606 0.4 AML other m 2021-03-05T18:58:55.25
IV.GAVE.EHN. ML:2.2 0.00193 0.4 AML other m 2021-03-05T18:58:55.25
IV.GAVE.HNE. ML:2.1 0.0017 0.24 AML other m 2021-03-05T18:58:56.03
IV.GAVE.EHE. ML:2.1 0.001615 0.24 AML other m 2021-03-05T18:58:56.03
IV.MOMA.HHN. ML:2 0.0007555 0.2 AML other m 2021-03-05T18:58:56.78
IV.MOMA.HNN. ML:1.9 0.0007155 0.22 AML other m 2021-03-05T18:58:56.78
IV.ARRO.EHE. ML:2.1 0.001079 0.24 AML other m 2021-03-05T18:58:56.80
IV.ARRO.EHN. ML:1.8 0.000628 1.82 AML other m 2021-03-05T18:58:57.91
IV.MOMA.HNE. ML:2 0.000848 0.12 AML other m 2021-03-05T18:58:57.39
IV.MOMA.HHE. ML:2 0.0008885 0.14 AML other m 2021-03-05T18:58:57.39
IV.CESX.HHN. ML:1.7 0.000367 0.8 AML other m 2021-03-05T18:58:58.67
IV.CESX.HHE. ML:1.7 0.0003715 1.3 AML other m 2021-03-05T18:58:58.14
IV.LNSS.HHE. ML:1.8 0.0003955 0.62 AML other m 2021-03-05T18:58:59.43
IV.LNSS.HHN. ML:1.8 0.000368 1.22 AML other m 2021-03-05T18:58:59.66
IV.NRCA.HHN. ML:2.2 0.000701 0.12 AML other m 2021-03-05T18:58:59.77
IV.NRCA.HNN. ML:2.2 0.00076 1.36 AML other m 2021-03-05T18:59:00.09
IV.NRCA.HNE. ML:2.1 0.0006255 0.12 AML other m 2021-03-05T18:59:00.29
IV.NRCA.HHE. ML:2.1 0.000676 0.12 AML other m 2021-03-05T18:59:00.29
IV.FDMO.HHE. ML:1.6 0.0001185 0.56 AML other m 2021-03-05T18:59:04.52
IV.FDMO.HHN. ML:1.4 8.14E-5 0.62 AML other m 2021-03-05T18:59:04.58
IV.RM33.EHE. ML:1.6 0.0001125 0.18 AML other m 2021-03-05T18:59:05.32
IV.RM33.EHN. ML:1.5 8.96E-5 1.18 AML other m 2021-03-05T18:59:05.22
IV.SMA1.EHN. ML:1.6 0.000118 0.54 AML other m 2021-03-05T18:59:06.53
IV.SMA1.EHE. ML:1.8 0.000187 0.26 AML other m 2021-03-05T18:59:06.54
IV.ATCC.EHN. ML:1.9 0.000216 0.32 AML other m 2021-03-05T18:59:06.70
IV.CSP1.EHN. ML:2.1 0.0002905 1.82 AML other m 2021-03-05T18:59:06.00
IV.ATCC.EHE. ML:1.9 0.0002215 0.4 AML other m 2021-03-05T18:59:06.72
IV.CSP1.EHE. ML:1.9 0.000194 0.24 AML other m 2021-03-05T18:59:07.30
IV.MGAB.HHN. ML:1.6 8.075E-5 0.16 AML other m 2021-03-05T18:59:08.26
IV.MGAB.HHE. ML:1.5 6.91E-5 0.42 AML other m 2021-03-05T18:59:09.06
IV.GUMA.HHN. ML:1.6 8.52E-5 0.56 AML other m 2021-03-05T18:59:09.04
IV.SRES.HHN. ML:1.2 3.34E-5 1.46 AML other m 2021-03-05T18:59:10.19
IV.SRES.HHE. ML:1.1 2.45E-5 0.9 AML other m 2021-03-05T18:59:10.94
IV.FIAM.HHN. ML:1.1 2.465E-5 1.48 AML other m 2021-03-05T18:59:11.93
IV.FIAM.HHE. ML:1.1 2.655E-5 1.12 AML other m 2021-03-05T18:59:11.19
IV.TERO.HHN. ML:1.4 3.885E-5 0.1 AML other m 2021-03-05T18:59:11.40
IV.GUMA.HHE. ML:1.8 0.0001345 0.42 AML other m 2021-03-05T18:59:11.68
IV.TERO.HHE. ML:1.2 3.095E-5 0.12 AML other m 2021-03-05T18:59:12.46
IV.EL6.EHE. ML:2.1 0.000197 1.54 AML other m 2021-03-05T18:59:12.94
IV.EL6.EHN. ML:2 0.000153 0.14 AML other m 2021-03-05T18:59:13.25
IV.SSFR.HHN. ML:2 0.000155 1.18 AML other m 2021-03-05T18:59:15.01
IV.SSFR.HHE. ML:2.1 0.000169 0.2 AML other m 2021-03-05T18:59:15.48
IV.PIEI.HHN. ML:1.6 4.255E-5 0.22 AML other m 2021-03-05T18:59:18.84
IV.PIEI.HHE. ML:1.6 4.785E-5 1 AML other m 2021-03-05T18:59:19.61
IV.TRIF.CHE. ML:2.2 7.585E-5 1.14 AML other m 2021-03-05T18:59:38.81
IV.TRIF.CHN. ML:2.3 8.425E-5 0.52 AML other m 2021-03-05T18:59:38.47
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