Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-02-2021 and time 12:05:39 (UTC) in region 2 km NE Cerreto d'Esi (AN)

A magnitude ML 1.1 earthquake occured in region: 2 km NE Cerreto d'Esi (AN), on

  • 20-02-2021 12:05:39 (UTC)
  • 20-02-2021 13:05:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.3340, 13.0030 at 21 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 d'Esi AN 2 3817 3817
Poggio San Vicino MC 8 246 4063
Fabriano AN 8 31480 35543
Matelica MC 9 9981 45524
Esanatoglia MC 10 2034 47558
Gagliole MC 12 620 48178
Genga AN 12 1797 49975
Apiro MC 12 2280 52255
Serra San Quirico AN 13 2850 55105
Castelraimondo MC 14 4587 59692
Cupramontana AN 16 4756 64448
Mergo AN 16 1037 65485
Sassoferrato AN 16 7285 72770
Fiuminata MC 17 1402 74172
Pioraco MC 17 1134 75306
Rosora AN 18 1985 77291
Cingoli MC 18 10352 87643
San Severino Marche MC 18 12726 100369
Staffolo AN 19 2253 102622
Maiolati Spontini AN 19 6248 108870
Castelplanio AN 19 3540 112410
Arcevia AN 19 4612 117022
San Paolo di Jesi AN 19 933 117955
Monte Roberto AN 20 3061 121016
Fossato di Vico PG 20 2840 123856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NE of Foligno (57155 inhabitants)
52 Km SW of Ancona (100861 inhabitants)
56 Km E of Perugia (166134 inhabitants)
57 Km S of Fano (60888 inhabitants)
65 Km S of Pesaro (94582 inhabitants)
88 Km SE of Rimini (147750 inhabitants)
91 Km NE of Terni (111501 inhabitants)
92 Km E of Arezzo (99543 inhabitants)
94 Km NW of Teramo (54892 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 2021-02-20
12:05:39		 43.3342 13.0033 21 2021-02-20
12:15:08		 Sala Sismica INGV-Roma 87320251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-20 12:05:39 ± 0.08
Latitude 43.3342 ± 0.0018
Longitude 13.0033 ± 0.0037
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87320251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 259
Semi-minor axis of confidence ellipse (meter) 109
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) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 18
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) 0.33725
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 87320251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-20 12:15:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-02-20T12:05:52.94 0.6 undecidable manual S 192 37.4292 111 0.14 47
IV.ATCC.EHZ. 2021-02-20T12:05:52.07 0.6 undecidable manual S 241 33.744 113 0.18 46
IV.FDMO.HHZ. 2021-02-20T12:05:51.72 0.6 undecidable manual S 168 33.744 113 -0.17 46
IV.SSFR.HHZ. 2021-02-20T12:05:49.09 0.6 undecidable manual S 303 21.1677 128 0.11 48
IV.PIEI.HHZ. 2021-02-20T12:05:48.29 3.0 undecidable manual P -0.12 0
IV.ARVD.HHZ. 2021-02-20T12:05:48.39 0.3 undecidable manual S 345 18.87 131 -0.12 73
IV.NARO.HHZ. 2021-02-20T12:05:48.76 3.0 negative manual P 0.02 0
IV.CING.HNZ. 2021-02-20T12:05:48.18 0.6 undecidable manual S 73 16.1727 136 0.19 48
IV.CESI.HHZ. 2021-02-20T12:05:47.28 0.6 undecidable manual P 192 37.4292 111 -0.06 47
IV.MMUR.HNN. 2021-02-20T12:05:47.20 0.3 undecidable manual S 358 11.9769 146 -0.08 74
IV.MPAG.EHZ. 2021-02-20T12:05:47.62 3.0 negative manual P 0.04 0
IV.ATFO.HHZ. 2021-02-20T12:05:47.02 3.0 positive manual P -0.02 0
IV.EL6.EHZ. 2021-02-20T12:05:46.63 0.3 undecidable manual S 94 7.9809 156 -0.13 74
IV.FRON.EHZ. 2021-02-20T12:05:46.33 0.3 undecidable manual P 312 30.2475 116 0 72
IV.ATCC.EHZ. 2021-02-20T12:05:46.83 0.1 undecidable manual P 241 33.744 113 0.02 96
IV.CSP1.EHZ. 2021-02-20T12:05:46.65 3.0 negative manual P 0.04 0
IV.FDMO.HHZ. 2021-02-20T12:05:46.77 0.3 undecidable manual P 168 33.744 113 -0.04 71
IV.SSFR.HHZ. 2021-02-20T12:05:45.13 0.1 positive manual P 303 21.1677 128 0 98
IV.CING.HNZ. 2021-02-20T12:05:44.69 0.1 undecidable manual P 73 16.1727 136 0.13 97
IV.MMUR.HNN. 2021-02-20T12:05:44.21 0.3 undecidable manual P 358 11.9769 146 0.06 74
IV.ARVD.HHZ. 2021-02-20T12:05:44.84 0.1 undecidable manual P 345 18.87 131 -0.02 98
IV.FOSV.EHZ. 2021-02-20T12:05:44.91 0.3 undecidable manual P 258 20.0688 129 -0.09 73
IV.EL6.EHZ. 2021-02-20T12:05:43.89 0.1 undecidable manual P 94 7.9809 156 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.5 0.0001515 0.22 AML other m 2021-02-20T12:05:49.19
IV.SSFR.HHN. ML:1.4 0.0001295 1.86 AML other m 2021-02-20T12:05:50.98
IV.FRON.EHE. ML:0.8 0.00002355 0.88 AML other m 2021-02-20T12:05:52.45
IV.FRON.EHN. ML:1.0 0.000041 0.84 AML other m 2021-02-20T12:05:52.68
IV.EL6.EHE. ML:1.3 0.0001481957 0.2816 AML other m 2021-02-20T12:05:46.98
IV.EL6.EHN. ML:1.2 0.00011657493 0.96 AML other m 2021-02-20T12:05:46.84
IV.ARVD.HHE. ML:1.0 0.000048635780000000005 0.5568 AML other m 2021-02-20T12:05:48.78
IV.ARVD.HHN. ML:1.0 0.00004765768500000001 0.1984 AML other m 2021-02-20T12:05:48.90
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