Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-02-2021 and time 18:33:56 (Italy) in region 4 km SE Cerreto di Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km SE Cerreto di Spoleto (PG), on

  • 27-02-2021 17:33:56 (UTC)
  • 27-02-2021 18:33:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7910, 12.9430 at 12 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.

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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 7 364 1439
Poggiodomo PG 9 117 1556
Cascia PG 10 3217 4773
Sant'Anatolia di Narco PG 11 564 5337
Sellano PG 11 1079 6416
Norcia PG 12 4957 11373
Scheggino PG 13 461 11834
Preci PG 13 724 12558
Campello sul Clitunno PG 14 2442 15000
Monteleone di Spoleto PG 16 599 15599
Spoleto PG 18 38218 53817
Trevi PG 19 8469 62286
Visso MC 20 1107 63393

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SE of Foligno (57155 inhabitants)
35 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
64 Km W of Teramo (54892 inhabitants)
80 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
Bulletin
Rev1000 		ML 1.2 2021-02-27
17:33:56		 42.7913 12.9428 12 2021-07-12
16:55:02		 Bollettino Sismico Italiano INGV 88185631
Reviewed
Rev100 		ML 1.2 2021-02-27
17:33:56		 42.7928 12.9385 11 2021-02-27
17:39:33		 Sala Sismica INGV-Roma 87543991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-27 17:33:56 ± 0.06
Latitude 42.7913 ± 0.0036
Longitude 12.9428 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88185631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 248
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.10522
Epicentral distance of station farthest from the epicenter (degree) 0.55038
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 88185631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-16 11:35:29

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 87543991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-27 17:39:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-02-27T17:34:15.71 0.3 undecidable manual S 12 61.0944 91 0.62 61
IV.CSP1.EHZ. 2021-02-27T17:34:09.64 0.6 undecidable manual S 32 39.5271 92 0.29 46
IV.CESX.HHN. 2021-02-27T17:34:08.07 0.3 undecidable manual S 235 35.4423 92 -0.18 70
IV.EL6.EHZ. 2021-02-27T17:34:07.16 0.3 undecidable manual P 12 61.0944 91 0 69
IV.ARRO.EHZ. 2021-02-27T17:34:06.01 0.6 undecidable manual S 212 27.6501 93 -0.16 48
IV.FDMO.HHZ. 2021-02-27T17:34:06.54 0.6 undecidable manual S 23 29.6481 93 -0.16 47
IV.MOMA.HHE. 2021-02-27T17:34:06.90 0.3 undecidable manual S 273 30.3474 93 -0.01 73
IV.LNSS.HHZ. 2021-02-27T17:34:04.81 0.6 undecidable manual S 159 22.3554 95 0.03 49
IV.CESI.HHZ. 2021-02-27T17:34:04.90 0.6 undecidable manual S 353 23.8539 95 -0.28 46
IV.CESX.HHN. 2021-02-27T17:34:03.00 0.6 undecidable manual P 235 35.4423 92 -0.22 46
IV.CSP1.EHZ. 2021-02-27T17:34:03.76 0.3 undecidable manual P 32 39.5271 92 -0.09 71
IV.MOMA.HHE. 2021-02-27T17:34:02.72 0.3 undecidable manual P 273 30.3474 93 0.28 70
IV.NRCA.HHZ. 2021-02-27T17:34:02.56 0.6 undecidable manual S 71 14.6742 107 -0.21 48
IV.ARRO.EHZ. 2021-02-27T17:34:02.02 0.3 undecidable manual P 212 27.6501 93 0 74
IV.FDMO.HHZ. 2021-02-27T17:34:02.20 0.1 undecidable manual P 23 29.6481 93 -0.12 95
IV.LNSS.HHZ. 2021-02-27T17:34:01.28 0.1 undecidable manual P 159 22.3554 95 0.07 98
IV.GAVE.EHZ. 2021-02-27T17:34:01.99 0.3 undecidable manual S 200 11.6772 119 -0.04 76
IV.CESI.HHZ. 2021-02-27T17:34:01.31 0.1 undecidable manual P 353 23.8539 95 -0.13 96
IV.NRCA.HHZ. 2021-02-27T17:34:00.09 0.1 negative manual P 71 14.6742 107 0.04 100
IV.GAVE.EHZ. 2021-02-27T17:33:59.71 0.1 positive manual P 200 11.6772 119 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.0001228 1.88 AML other m 2021-02-27T17:34:02.94
IV.GAVE.EHN. ML:1.1 0.0001375 1.84 AML other m 2021-02-27T17:34:03.00
IV.GAVE.EHE. ML:1.1 0.0001465 0.14 AML other m 2021-02-27T17:34:03.38
IV.NRCA.HHE. ML:1.1 0.00011949999999999999 1.84 AML other m 2021-02-27T17:34:04.95
IV.LNSS.HHE. ML:1.3 0.00012705 1.86 AML other m 2021-02-27T17:34:05.05
IV.CESI.HHN. ML:1.4 0.00014299999999999998 0.5 AML other m 2021-02-27T17:34:05.08
IV.CESI.HHE. ML:1.1 0.00006775000000000001 0.44 AML other m 2021-02-27T17:34:05.16
IV.LNSS.HHN. ML:1.2 0.0001125 0.2 AML other m 2021-02-27T17:34:05.21
IV.FDMO.HHN. ML:1.3 0.00010059999999999999 0.14 AML other m 2021-02-27T17:34:06.74
IV.FDMO.HHE. ML:1.3 0.00009279999999999999 0.34 AML other m 2021-02-27T17:34:06.71
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