Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 03-04-2021 and time 14:22:50 (Italy) in region 4 km SE Cerreto di Spoleto (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km SE Cerreto di Spoleto (PG), on

  • 03-04-2021 12:22:50 (UTC)
  • 03-04-2021 14:22:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7970, 12.9520 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.

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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
Vallo di Nera PG 8 364 1439
Poggiodomo PG 9 117 1556
Cascia PG 10 3217 4773
Sellano PG 11 1079 5852
Norcia PG 12 4957 10809
Sant'Anatolia di Narco PG 12 564 11373
Preci PG 12 724 12097
Scheggino PG 14 461 12558
Campello sul Clitunno PG 14 2442 15000
Monteleone di Spoleto PG 16 599 15599
Spoleto PG 19 38218 53817
Visso MC 19 1107 54924
Trevi PG 19 8469 63393
Castelsantangelo sul Nera MC 20 281 63674

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Foligno (57155 inhabitants)
36 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
63 Km W of Teramo (54892 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
93 Km N of Tivoli (56533 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2021-04-03
12:22:50		 42.7967 12.9518 10 2021-04-03
12:30:03		 Sala Sismica INGV-Roma 88739101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-03 12:22:50 ± 0.04
Latitude 42.7967 ± 0.0018
Longitude 12.9518 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88739101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 365
Semi-minor axis of confidence ellipse (meter) 118
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 271
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34804
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 88739101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-03 12:30:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EPZF.HHZ. 2021-04-03T12:24:22.39 3.0 positive manual Pg 17.030001 0
IV.PCN.EHZ. 2021-04-03T12:24:19.24 3.0 undecidable manual Sn -3.45 0
GU.BLANC.HHZ. 2021-04-03T12:24:18.21 3.0 undecidable manual Pg 7.86 0
IV.NOV.HHZ. 2021-04-03T12:24:17.12 3.0 positive manual Pg 13.55 0
IV.VOBA.EHZ. 2021-04-03T12:24:10.99 3.0 undecidable manual Sn -9.99 0
IX.MNT3.HHZ.02 2021-04-03T12:24:10.43 3.0 undecidable manual Sg 12.24 0
GU.GRAM.HHZ. 2021-04-03T12:24:09.03 3.0 undecidable manual Sg -0.43 0
ST.CARE.EHZ. 2021-04-03T12:24:00.18 3.0 undecidable manual Pg 7.78 0
IV.MILN.HNZ. 2021-04-03T12:23:56.02 3.0 undecidable manual Pg 6.12 0
IV.BRES.EHZ. 2021-04-03T12:23:56.59 3.0 undecidable manual Pg 3.89 0
IV.SARZ.HHZ. 2021-04-03T12:23:42.94 3.0 undecidable manual Pn -3.99 0
IV.NDIM.HNZ. 2021-04-03T12:23:36.58 3.0 negative manual Pg 3.47 0
IV.ZCCA.HHZ. 2021-04-03T12:23:25.29 3.0 undecidable manual Pg -1.62 0
IV.PTRJ.HHZ. 2021-04-03T12:23:24.29 3.0 undecidable manual Pg 4.57 0
IV.IMOL.HNZ. 2021-04-03T12:23:24.85 3.0 positive manual Pg 2.32 0
IV.LAV9.HNZ. 2021-04-03T12:23:22.64 3.0 undecidable manual Sg -3.19 0
IV.MNTT.EHZ. 2021-04-03T12:23:13.07 3.0 undecidable manual Sn 2.3 0
IV.LRP.EHZ. 2021-04-03T12:23:11.09 3.0 undecidable manual Pg -0.24 0
IV.POFI.HHZ. 2021-04-03T12:23:06.46 3.0 positive manual Pn -4.52 0
IV.OFFI.HHZ. 2021-04-03T12:23:02.34 3.0 undecidable manual Pg 0.88 0
IV.FDMO.HHZ. 2021-04-03T12:23:01.21 0.6 undecidable manual S 22 28.749 50 -0.1 48
IV.CESI.HHZ. 2021-04-03T12:22:59.86 0.6 undecidable manual S 351 23.4543 114 0.02 50
IV.LNSS.HHZ. 2021-04-03T12:22:59.44 0.6 undecidable manual S 161 22.6551 114 -0.16 48
IV.RM33.HNZ. 2021-04-03T12:22:58.50 0.3 undecidable manual P 146 38.4282 50 0.07 72
IV.CSP1.EHZ. 2021-04-03T12:22:58.61 0.6 undecidable manual P 32 38.628 50 0.15 47
IV.NRCA.HNZ. 2021-04-03T12:22:56.94 0.6 undecidable manual S 73 13.875 126 0 51
IV.GAVE.EHZ. 2021-04-03T12:22:56.53 0.6 undecidable manual S 202 12.4764 129 -0.04 50
IV.FDMO.HHZ. 2021-04-03T12:22:56.82 0.6 negative manual P 22 28.749 50 -0.12 48
IV.CESI.HHZ. 2021-04-03T12:22:56.01 0.3 undecidable manual P 351 23.4543 114 -0.08 74
IV.LNSS.HHZ. 2021-04-03T12:22:55.89 0.6 undecidable manual P 161 22.6551 114 -0.06 49
IV.NRCA.HNZ. 2021-04-03T12:22:54.48 0.1 undecidable manual P 73 13.875 126 0.06 100
IV.GAVE.EHZ. 2021-04-03T12:22:54.40 0.6 negative manual P 202 12.4764 129 0.19 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.7 0.000037380475 0.1216 AML other m 2021-04-03T12:23:00.24
IV.LNSS.HHE. ML:0.8 0.00004166102 0.16 AML other m 2021-04-03T12:23:00.25
IV.GAVE.EHE. ML:1.0 0.00011238544999999999 0.0832 AML other m 2021-04-03T12:22:57.02
IV.GAVE.EHN. ML:0.9 0.000086501755 0.1024 AML other m 2021-04-03T12:22:56.79
IV.GAVE.HNE. ML:1.1 0.00013528155499999999 0.16 AML other m 2021-04-03T12:22:56.98
IV.GAVE.HNN. ML:1.1 0.00013896171 0.5632 AML other m 2021-04-03T12:22:56.78
IV.LNSS.HNE. ML:1.2 0.0001121185 0.6464 AML other m 2021-04-03T12:23:04.13
IV.LNSS.HNN. ML:1.3 0.00012984210000000003 0.6848 AML other m 2021-04-03T12:23:03.02
IV.CESI.HHE. ML:0.6 0.000027333305000000002 0.864 AML other m 2021-04-03T12:23:09.72
IV.CESI.HHN. ML:0.5 0.000021642836999999997 0.16 AML other m 2021-04-03T12:23:00.11
IV.CESI.HNE. ML:1.3 0.000118232905 1.024 AML other m 2021-04-03T12:23:03.38
IV.CESI.HNN. ML:1.3 0.00012757665000000002 0.7424 AML other m 2021-04-03T12:23:08.79
IV.FDMO.HHE. ML:0.7 0.000023250544999999997 0.1792 AML other m 2021-04-03T12:23:01.65
IV.FDMO.HHN. ML:0.8 0.000034436920000000004 1.6192 AML other m 2021-04-03T12:23:12.12
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