Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 30-01-2021 and time 04:40:46 (UTC) in region 4 km NE Cerreto di Spoleto (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km NE Cerreto di Spoleto (PG), on

  • 30-01-2021 04:40:46 (UTC)
  • 30-01-2021 05:40:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8420, 12.9520 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.

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 4 1075 1075
Sellano PG 6 1079 2154
Preci PG 8 724 2878
Vallo di Nera PG 11 364 3242
Norcia PG 13 4957 8199
Campello sul Clitunno PG 14 2442 10641
Poggiodomo PG 15 117 10758
Cascia PG 15 3217 13975
Visso MC 15 1107 15082
Sant'Anatolia di Narco PG 15 564 15646
Trevi PG 17 8469 24115
Scheggino PG 17 461 24576
Monte Cavallo MC 17 145 24721
Castelsantangelo sul Nera MC 18 281 25002
Ussita MC 19 444 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
98 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 1.1 2021-01-30
04:40:46		 42.8422 12.952 11 2021-01-30
04:50:31		 Sala Sismica INGV-Roma 86703211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-30 04:40:46 ± 0.03
Latitude 42.8422 ± 0.0018
Longitude 12.9520 ± 0.0025
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 86703211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 185
Semi-minor axis of confidence ellipse (meter) 149
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.49912
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 86703211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-30 04:50:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-01-30T04:41:03.33 1.0 undecidable manual S 13 55.4001 50 0.02 23
IV.CESX.HHN. 2021-01-30T04:40:58.98 0.1 undecidable manual S 229 39.4272 50 -0.08 95
IV.MOMA.HNE. 2021-01-30T04:40:57.04 0.1 undecidable manual S 262 31.3464 50 0.14 95
IT.GNU.HGE. 2021-01-30T04:40:57.15 0.3 undecidable manual S 262 31.3464 50 0.26 69
IV.ARRO.EHN. 2021-01-30T04:40:57.41 0.1 undecidable manual S 208 32.9448 50 0.1 95
IV.ASSB.HHZ. 2021-01-30T04:40:57.01 0.3 undecidable manual S 313 32.5452 50 -0.21 70
IV.MMO1.EHZ. 2021-01-30T04:40:56.88 0.1 undecidable manual S 78 31.1466 50 0.05 97
IV.EL6.EHZ. 2021-01-30T04:40:56.30 0.3 undecidable manual P 13 55.4001 50 0.31 66
IV.MML1.EHE. 2021-01-30T04:40:56.57 0.1 undecidable manual S 3 30.1476 50 0 98
IV.LNSS.HHZ. 2021-01-30T04:40:55.70 0.1 undecidable manual S 165 27.5502 50 -0.17 95
IV.FDMO.HHZ. 2021-01-30T04:40:54.86 0.1 undecidable manual S 27 24.1536 50 -0.12 96
IV.CESX.HHN. 2021-01-30T04:40:53.38 0.6 undecidable manual P 229 39.4272 50 -0.16 47
IV.SEF1.HNZ. 2021-01-30T04:40:53.75 3.0 undecidable manual P 0
IV.CESI.HHZ. 2021-01-30T04:40:53.35 0.1 undecidable manual S 348 18.4704 120 -0.07 99
IV.ASSB.HHZ. 2021-01-30T04:40:52.29 0.6 negative manual P 313 32.5452 50 -0.19 47
IT.MTCL.HGN. 2021-01-30T04:40:52.85 0.1 undecidable manual S 13 17.2716 122 -0.21 96
IV.MOMA.HNE. 2021-01-30T04:40:52.30 0.1 undecidable manual P 262 31.3464 50 0.01 97
IV.GAVE.EHZ. 2021-01-30T04:40:52.77 0.6 undecidable manual S 196 17.2716 122 -0.3 47
IV.MMO1.EHZ. 2021-01-30T04:40:52.26 0.3 positive manual P 78 31.1466 50 0 73
IV.MML1.EHE. 2021-01-30T04:40:52.08 0.1 undecidable manual P 3 30.1476 50 -0.02 97
IT.GNU.HGE. 2021-01-30T04:40:52.34 0.3 undecidable manual P 262 31.3464 50 0.05 72
IV.FEMA.HNN. 2021-01-30T04:40:52.68 0.1 undecidable manual S 31 15.4734 125 0.13 98
IV.ARRO.EHN. 2021-01-30T04:40:52.60 0.1 undecidable manual P 208 32.9448 50 0.07 96
IV.NRCA.HHZ. 2021-01-30T04:40:51.98 0.1 undecidable manual S 94 13.2756 129 0.06 100
IV.FDMO.HHZ. 2021-01-30T04:40:51.16 0.3 positive manual P 27 24.1536 50 -0.03 74
IV.LNSS.HHZ. 2021-01-30T04:40:51.57 0.1 undecidable manual P 165 27.5502 50 -0.13 96
IV.CESI.HHZ. 2021-01-30T04:40:50.37 1.0 positive manual P 348 18.4704 120 0.09 25
IT.MTCL.HGN. 2021-01-30T04:40:50.08 0.1 undecidable manual P 13 17.2716 122 0 100
IV.GAVE.EHZ. 2021-01-30T04:40:50.17 0.6 positive manual P 196 17.2716 122 0.09 49
IV.FEMA.HNN. 2021-01-30T04:40:49.86 0.1 undecidable manual P 31 15.4734 125 0.08 99
IV.NRCA.HHZ. 2021-01-30T04:40:49.53 0.1 positive manual P 94 13.2756 129 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.00034 0.16 AML other m 2021-01-30T04:40:52.04
IV.NRCA.HHE. ML:1.3 0.0002201489 0.1184 AML other m 2021-01-30T04:40:52.62
IV.FDMO.HHE. ML:1.2 0.00009060000000000002 1.86 AML other m 2021-01-30T04:40:55.05
IV.FDMO.HHN. ML:1.0 0.00005985 0.22 AML other m 2021-01-30T04:40:55.15
IV.NRCA.HNE. ML:1.3 0.00022025335 0.1408 AML other m 2021-01-30T04:40:52.62
IV.NRCA.HNN. ML:1.5 0.000342259715 0.16 AML other m 2021-01-30T04:40:52.03
IV.GAVE.EHE. ML:1.0 0.00008874466000000001 0.1408 AML other m 2021-01-30T04:40:53.30
IV.GAVE.EHN. ML:1.0 0.000090392105 0.08 AML other m 2021-01-30T04:40:53.68
IV.GAVE.HNE. ML:1.1 0.00011663469000000002 0.1408 AML other m 2021-01-30T04:40:53.23
IV.CESI.HHE. ML:0.9 0.00005949952 0.24 AML other m 2021-01-30T04:40:53.65
IV.CESI.HHN. ML:1.1 0.00009258028 0.1984 AML other m 2021-01-30T04:40:53.52
IV.LNSS.HHE. ML:1.0 0.0000505896 0.1216 AML other m 2021-01-30T04:40:56.94
IV.LNSS.HHN. ML:0.8 0.0000352225657 0.1184 AML other m 2021-01-30T04:40:56.72
IV.ASSB.HHE. ML:1.0 0.000042210015000000005 0.3584 AML other m 2021-01-30T04:40:57.49
IV.ASSB.HHN. ML:1.1 0.000055761645 0.16 AML other m 2021-01-30T04:40:58.73
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