Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-03-2021 and time 17:01:02 (Italy) in region 5 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.8 earthquake occured in region: 5 km NE Cerreto di Spoleto (PG), on

  • 22-03-2021 16:01:02 (UTC)
  • 22-03-2021 17:01:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8490, 12.9640 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Cerreto di Spoleto PG 5 1075 1075
Sellano PG 5 1079 2154
Preci PG 7 724 2878
Vallo di Nera PG 12 364 3242
Norcia PG 12 4957 8199
Visso MC 14 1107 9306
Cascia PG 15 3217 12523
Poggiodomo PG 15 117 12640
Campello sul Clitunno PG 16 2442 15082
Castelsantangelo sul Nera MC 16 281 15363
Monte Cavallo MC 17 145 15508
Sant'Anatolia di Narco PG 17 564 16072
Ussita MC 18 444 16516
Trevi PG 18 8469 24985
Scheggino PG 19 461 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
96 Km N of Guidonia Montecelio (88673 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.8 2021-03-22
16:01:02		 42.8492 12.9637 11 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91235051
Reviewed
Rev100 		ML 1.8 2021-03-22
16:01:02		 42.8483 12.9623 11 2021-06-17
12:58:51		 Sala Sismica INGV-Roma 88383991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-22 16:01:02 ± 0.04
Latitude 42.8492 ± 0.0018
Longitude 12.9637 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91235051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 241
Semi-minor axis of confidence ellipse (meter) 114
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 53
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64841
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 88383991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-22 16:07:57

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 91235051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-13 17:39:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-03-22T16:01:19.62 0.6 undecidable manual S 12 54.4011 50 0.44 43
IV.ATCC.EHE. 2021-03-22T16:01:17.22 0.6 undecidable manual S 325 45.621 50 0.39 44
IV.RM33.HNE. 2021-03-22T16:01:16.30 0.6 undecidable manual S 151 42.9237 50 0.19 47
IV.CESX.HHZ. 2021-03-22T16:01:15.53 0.6 undecidable manual S 229 40.7259 50 0.01 48
IV.PF6.EHN. 2021-03-22T16:01:14.36 1.0 undecidable manual S 30 37.1295 50 -0.2 23
IV.ATSC.EHE. 2021-03-22T16:01:14.47 1.0 undecidable manual P 341 67.5768 50 0.48 21
IV.ATLO.EHE. 2021-03-22T16:01:14.40 1.0 undecidable manual P 319 68.5758 50 0.26 22
IV.ARVD.HHE. 2021-03-22T16:01:14.70 1.0 undecidable manual P 359 71.9724 50 0.03 23
IV.MOMA.HHZ. 2021-03-22T16:01:13.61 0.6 undecidable manual Sg 100
IV.ARRO.EHZ. 2021-03-22T16:01:13.49 0.6 undecidable manual S 208 34.0437 50 -0.25 47
IV.SSFR.HHN. 2021-03-22T16:01:13.87 1.0 undecidable manual P 347 66.7776 50 0.01 23
IV.MGAB.HHZ. 2021-03-22T16:01:13.86 1.0 undecidable manual P 276 69.5748 50 -0.44 21
IV.CING.HNZ. 2021-03-22T16:01:13.10 0.3 undecidable manual P 18 61.2942 50 0.08 69
IV.ASSB.HHZ. 2021-03-22T16:01:13.36 0.6 undecidable manual S 311 32.745 50 -0.04 49
IV.CSP1.EHZ. 2021-03-22T16:01:13.54 0.3 undecidable manual S 36 33.2445 50 0 74
IV.MML1.HNZ. 2021-03-22T16:01:12.58 0.3 undecidable manual S 1 29.3484 50 0.09 73
IV.MMO1.EHZ. 2021-03-22T16:01:12.55 0.3 undecidable manual S 79 30.0477 50 -0.12 72
IV.MURB.HHE. 2021-03-22T16:01:12.27 1.0 undecidable manual P 322 58.0974 50 -0.25 22
IV.LNSS.HHZ. 2021-03-22T16:01:11.94 0.3 undecidable manual S 167 28.0497 50 -0.2 71
IV.EL6.EHZ. 2021-03-22T16:01:11.98 0.3 undecidable manual P 12 54.4011 50 0.02 71
IV.RM33.HNE. 2021-03-22T16:01:10.36 0.6 undecidable manual P 151 42.9237 50 0.17 47
IV.ATCC.EHE. 2021-03-22T16:01:10.70 1.0 undecidable manual P 325 45.621 50 0.1 24
IV.MF5.EHN. 2021-03-22T16:01:10.71 1.0 undecidable manual P 69 43.1235 50 0.49 22
IV.FDMO.HHZ. 2021-03-22T16:01:10.55 0.3 undecidable manual S 26 23.0547 50 -0.26 71
IV.CESX.HHZ. 2021-03-22T16:01:09.81 1.0 undecidable manual P 229 40.7259 50 -0.04 24
IV.CESI.HHZ. 2021-03-22T16:01:09.17 0.3 undecidable manual S 344 17.9709 121 -0.14 74
IV.GAVE.HNZ. 2021-03-22T16:01:09.45 0.6 undecidable manual S 198 18.2706 120 0.02 50
IV.PF6.EHN. 2021-03-22T16:01:09.13 0.3 undecidable manual P 30 37.1295 50 -0.16 71
IV.MC2.EHZ. 2021-03-22T16:01:09.98 0.6 undecidable manual S 69 19.5693 118 0.17 49
IV.ASSB.HHZ. 2021-03-22T16:01:08.60 0.6 undecidable manual P 311 32.745 50 -0.02 49
IV.CSP1.EHZ. 2021-03-22T16:01:08.68 0.3 undecidable manual P 36 33.2445 50 -0.02 73
IV.ARRO.EHZ. 2021-03-22T16:01:08.83 0.6 undecidable manual P 208 34.0437 50 0.01 49
IV.MML1.HNZ. 2021-03-22T16:01:08.01 0.3 undecidable manual P 1 29.3484 50 -0.08 73
IV.MMO1.EHZ. 2021-03-22T16:01:08.19 0.3 undecidable manual P 79 30.0477 50 -0.01 74
IT.MTCL.HGZ. 2021-03-22T16:01:08.49 0.3 undecidable manual S 10 16.2726 123 -0.35 71
IV.FEMA.HNZ. 2021-03-22T16:01:08.12 0.6 undecidable manual S 29 14.3745 126 -0.15 49
IV.FDMO.HHZ. 2021-03-22T16:01:07.04 0.3 undecidable manual P 26 23.0547 50 -0.09 74
IV.LNSS.HHZ. 2021-03-22T16:01:07.80 0.3 undecidable manual P 167 28.0497 50 -0.09 73
IV.NRCA.HNZ. 2021-03-22T16:01:07.65 0.3 undecidable manual S 98 12.3765 131 -0.09 75
IV.MC2.EHZ. 2021-03-22T16:01:06.98 0.6 undecidable manual P 69 19.5693 118 0.43 46
IT.MTCL.HGZ. 2021-03-22T16:01:06.01 0.3 undecidable manual P 10 16.2726 123 0.03 76
IV.CESI.HHZ. 2021-03-22T16:01:06.31 0.1 undecidable manual P 344 17.9709 121 0.05 100
IV.GAVE.HNZ. 2021-03-22T16:01:06.45 0.3 undecidable manual P 198 18.2706 120 0.12 74
IV.NRCA.HNZ. 2021-03-22T16:01:05.40 0.3 undecidable manual P 98 12.3765 131 0.05 76
IV.FEMA.HNZ. 2021-03-22T16:01:05.86 0.3 undecidable manual P 29 14.3745 126 0.2 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.0 0.0009850000000000002 0.58 AML other m 2021-03-22T16:01:07.78
IV.NRCA.HHN. ML:2.0 0.001056 0.1 AML other m 2021-03-22T16:01:07.78
IV.NRCA.HNE. ML:2.0 0.0011480000000000001 0.14 AML other m 2021-03-22T16:01:07.81
IV.NRCA.HHE. ML:2.0 0.0012195 0.14 AML other m 2021-03-22T16:01:07.81
IV.CESI.HHN. ML:1.8 0.0005735 0.36 AML other m 2021-03-22T16:01:09.50
IV.GAVE.EHN. ML:1.8 0.0005409999999999999 1.6 AML other m 2021-03-22T16:01:09.92
IV.CESI.HHE. ML:1.5 0.0002525 0.16 AML other m 2021-03-22T16:01:09.86
IV.GAVE.EHE. ML:2.0 0.0008285 0.88 AML other m 2021-03-22T16:01:10.19
IV.FDMO.HHN. ML:1.6 0.0002495 0.98 AML other m 2021-03-22T16:01:10.22
IV.FDMO.HHE. ML:1.9 0.000526 0.36 AML other m 2021-03-22T16:01:10.75
IV.LNSS.HHE. ML:1.8 0.000313 0.26 AML other m 2021-03-22T16:01:12.21
IV.LNSS.HHN. ML:2.0 0.00047500000000000005 0.24 AML other m 2021-03-22T16:01:12.36
IV.LNSS.HNN. ML:2.0 0.0004735 0.22 AML other m 2021-03-22T16:01:12.37
IV.LNSS.HNE. ML:1.9 0.0003795 1.22 AML other m 2021-03-22T16:01:12.34
IV.ASSB.HHE. ML:1.5 0.00014800000000000002 0.32 AML other m 2021-03-22T16:01:13.62
IV.ASSB.HHN. ML:1.7 0.000203 0.38 AML other m 2021-03-22T16:01:13.65
IV.CESX.HHN. ML:1.6 0.00013169999999999998 1.44 AML other m 2021-03-22T16:01:16.09
IV.CESX.HHE. ML:1.6 0.000132 0.72 AML other m 2021-03-22T16:01:17.44
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