Earthquake 3 km NW Visso (MC), Magnitude ML 1.6, 20 January 2021 time 15:56:23 (Timezone UTC)

A magnitude ML 1.6 earthquake occured in region: 3 km NW Visso (MC), on

20-01-2021 15:56:23 (UTC)
20-01-2021 16:56:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.96, 13.06 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.

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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Visso	MC	4	1107	1107
Ussita	MC	6	444	1551
Monte Cavallo	MC	7	145	1696
Preci	PG	9	724	2420
Fiordimonte	MC	9	202	2622
Pieve Torina	MC	10	1458	4080
Castelsantangelo sul Nera	MC	10	281	4361
Fiastra	MC	12	559	4920
Pievebovigliana	MC	12	866	5786
Acquacanina	MC	12	121	5907
Sellano	PG	13	1079	6986
Bolognola	MC	14	142	7128
Muccia	MC	14	915	8043
Serravalle di Chienti	MC	16	1070	9113
Norcia	PG	18	4957	14070
Cerreto di Spoleto	PG	19	1075	15145
Camerino	MC	20	6974	22119

Municipalities with at least 50000 inhabitants

An earthquake occurred to

29 Km E of Foligno (57155 inhabitants)

56 Km NE of Terni (111501 inhabitants)

57 Km E of Perugia (166134 inhabitants)

62 Km NW of Teramo (54892 inhabitants)

73 Km NW of L'Aquila (69753 inhabitants)

82 Km SW of Ancona (100861 inhabitants)

99 Km NE of Viterbo (67173 inhabitants)

99 Km S of Fano (60888 inhabitants)

Recent and historical Seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Reviewed Rev100	ML 1.6	2021-01-20 15:56:23	42.96	13.06	11	2021-01-20 16:02:10	Sala Sismica INGV-Roma	86403431

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2021-01-20 15:56:23 ± 0.04
Latitude	42.96 ± 0.00
Longitude	13.06 ± 0.00
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	86403431

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	350
Semi-minor axis of confidence ellipse (meter)	274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	226
Circular confidence region, given by single value of horizontal uncertainty (meter)	350
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	81
Number of associated phases, regardless of their use for origin computation	46
Number of defining phases	31
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.19
Epicentral distance of station closest to the epicenter (degree)	0
Epicentral distance of station farthest from the epicenter (degree)	0.38401
Number of stations at which the event was observed	29
Number of stations from which data was used for origin computation	16

Magnitude information

ML:1.6

Field	Value
Value	1.6
Uncertainty	0.3
Num. used stations	44
Type of magnitude	ML
Reference to an origin	86403431
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2021-01-20 16:02:10

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance	Takeoff_angle	Residual	Weight
IV.TOLF.HHZ.	2021-01-20T15:57:01.16	3.0	undecidable	manual	S				-1.14	0
IV.LMD.HHZ.	2021-01-20T15:56:49.35	3.0	undecidable	manual	P				-0.11	0
IV.PIEI.HHZ.	2021-01-20T15:56:48.26	3.0	undecidable	manual	S				-0.07	0
IV.ARVD.HHZ.	2021-01-20T15:56:43.80	3.0	undecidable	manual	S				0.29	0
IV.PIEI.HHZ.	2021-01-20T15:56:37.09	3.0	positive	manual	P				-0.29	0
IV.NARO.HHZ.	2021-01-20T15:56:37.99	3.0	negative	manual	P				-0.26	0
IV.ATCC.EHZ.	2021-01-20T15:56:37.89	0.3	undecidable	manual	S	307	0.384	50	0.47	65
IV.SMA1.EHZ.	2021-01-20T15:56:37.62	0.3	undecidable	manual	S	149	0.3822	50	0.26	68
IV.LNSS.HHZ.	2021-01-20T15:56:36.55	0.6	undecidable	manual	S	183	0.3543	50	0.02	48
IV.FRON.EHZ.	2021-01-20T15:56:35.58	3.0	undecidable	manual	P				-0.27	0
IV.ASSB.HHZ.	2021-01-20T15:56:35.04	0.6	undecidable	manual	S	286	0.3085	50	-0.12	47
IV.MTRA.EHZ.	2021-01-20T15:56:35.50	0.6	undecidable	manual	S	129	0.3157	50	0.12	47
IV.ARVD.HHZ.	2021-01-20T15:56:34.50	3.0	positive	manual	P				-0.17	0
IV.GAVE.EHZ.	2021-01-20T15:56:34.59	0.3	undecidable	manual	S	205	0.2923	50	-0.1	71
IV.SSFR.HHZ.	2021-01-20T15:56:34.16	3.0	negative	manual	P				-0.01	0
IV.MNTT.EHZ.	2021-01-20T15:56:33.00	3.0	positive	manual	P				0.98	0
IV.TERO.HHZ.	2021-01-20T15:56:33.86	3.0	undecidable	manual	P				-0.22	0
IV.MOMA.HHZ.	2021-01-20T15:56:32.38	3.0	negative	manual	P				0.66	0
IV.RM33.EHZ.	2021-01-20T15:56:32.79	3.0	negative	manual	P				-0.18	0
IV.GUMA.HHZ.	2021-01-20T15:56:32.44	0.6	undecidable	manual	S	62	0.2248	50	-0.25	47
IV.MMO1.EHZ.	2021-01-20T15:56:31.94	0.6	undecidable	manual	S	107	0.2014	50	-0.05	49
IV.ATCC.EHZ.	2021-01-20T15:56:31.56	1.0	undecidable	manual	P	307	0.384	50	0.01	24
IV.SMA1.EHZ.	2021-01-20T15:56:31.47	0.6	negative	manual	P	149	0.3822	50	-0.05	47
IV.FOSV.EHZ.	2021-01-20T15:56:31.93	3.0	positive	manual	P				-0.06	0
IV.EL6.EHZ.	2021-01-20T15:56:31.54	3.0	negative	manual	P				0.08	0
IV.LNSS.HHZ.	2021-01-20T15:56:30.85	0.1	undecidable	manual	P	183	0.3543	50	-0.19	92
IV.MTRA.EHZ.	2021-01-20T15:56:30.37	0.3	negative	manual	P	129	0.3157	50	0	72
IV.MF5.EHZ.	2021-01-20T15:56:30.58	0.6	positive	manual	P	84	0.2914	50	0.62	42
IV.CSP1.EHZ.	2021-01-20T15:56:30.85	0.3	undecidable	manual	S	37	0.17	50	-0.21	71
IV.ASSB.HHZ.	2021-01-20T15:56:30.17	0.1	undecidable	manual	P	286	0.3085	50	-0.08	95
IV.MC2.EHZ.	2021-01-20T15:56:29.22	0.6	undecidable	manual	S	116	0.1025	134	0.21	48
IV.NRCA.HNZ.	2021-01-20T15:56:29.50	0.3	undecidable	manual	S	163	0.1286	127	-0.28	71
IV.CESI.HHZ.	2021-01-20T15:56:29.60	0.3	undecidable	manual	S	292	0.1259	128	-0.09	74
IV.GAVE.EHZ.	2021-01-20T15:56:29.90	0.6	positive	manual	P	205	0.2923	50	-0.08	48
IV.GUMA.HHZ.	2021-01-20T15:56:28.27	0.1	positive	manual	P	62	0.2248	50	-0.55	86
IV.MMO1.EHZ.	2021-01-20T15:56:28.46	0.1	positive	manual	P	107	0.2014	50	0.05	98
IV.FDMO.HHZ.	2021-01-20T15:56:28.35	0.6	undecidable	manual	S	12	0.0809	140	-0.1	49
IV.CSP1.EHZ.	2021-01-20T15:56:28.02	0.1	positive	manual	P	37	0.17	50	0.14	96
IV.FEMA.HNZ.	2021-01-20T15:56:27.31	0.3	undecidable	manual	S	297	0.0117	173	-0.05	76
IV.NRCA.HNZ.	2021-01-20T15:56:27.12	0.1	positive	manual	P	163	0.1286	127	-0.02	99
IT.MTCL.HGZ.	2021-01-20T15:56:27.69	0.3	undecidable	manual	S	308	0.0594	149	-0.28	72
IV.CESI.HHZ.	2021-01-20T15:56:27.18	0.1	negative	manual	P	292	0.1259	128	0.09	98
IV.FDMO.HHZ.	2021-01-20T15:56:26.52	0.1	undecidable	manual	P	12	0.0809	140	0.14	98
IV.MC2.EHZ.	2021-01-20T15:56:26.90	0.1	undecidable	manual	P	116	0.1025	134	0.2	96
IT.MTCL.HGZ.	2021-01-20T15:56:26.16	0.1	negative	manual	P	308	0.0594	149	0.06	100
IV.FEMA.HNZ.	2021-01-20T15:56:25.93	0.1	negative	manual	P	297	0.0117	173	0.19	98

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.FEMA.HNN.	ML:1.7	0.000986	0.74	AML	other	m	2021-01-20T15:56:27.72
IV.FEMA.HNE.	ML:1.8	0.001005	0.32	AML	other	m	2021-01-20T15:56:27.65
IV.FDMO.HHN.	ML:1.8	0.0008265	0.16	AML	other	m	2021-01-20T15:56:28.47
IV.FDMO.HHE.	ML:1.9	0.0010535	0.16	AML	other	m	2021-01-20T15:56:28.74
IV.CESI.HHE.	ML:1.9	0.0008	0.1	AML	other	m	2021-01-20T15:56:29.72
IV.CESI.HNE.	ML:1.9	0.0008025	0.1	AML	other	m	2021-01-20T15:56:29.67
IV.CESI.HHN.	ML:1.9	0.000862	0.28	AML	other	m	2021-01-20T15:56:29.81
IV.CESI.HNN.	ML:1.9	0.000791	1.5	AML	other	m	2021-01-20T15:56:29.81
IV.NRCA.HHN.	ML:2	0.001053	0.62	AML	other	m	2021-01-20T15:56:29.62
IV.NRCA.HHE.	ML:1.9	0.000729	0.2	AML	other	m	2021-01-20T15:56:30.69
IV.CSP1.EHN.	ML:2.1	0.0009595	0.42	AML	other	m	2021-01-20T15:56:31.25
IV.CSP1.EHE.	ML:2	0.0008535	0.32	AML	other	m	2021-01-20T15:56:31.87
IV.GUMA.HHE.	ML:1.9	0.000523	0.28	AML	other	m	2021-01-20T15:56:32.72
IV.GUMA.HHN.	ML:1.6	0.000242	1.32	AML	other	m	2021-01-20T15:56:33.85
IV.GAVE.EHE.	ML:1.8	0.0002425	1.52	AML	other	m	2021-01-20T15:56:35.08
IV.GAVE.EHN.	ML:1.6	0.000196	0.54	AML	other	m	2021-01-20T15:56:35.22
IV.ASSB.HHN.	ML:1.6	0.00018	0.22	AML	other	m	2021-01-20T15:56:35.31
IV.ASSB.HHE.	ML:1.6	0.0001745	1.1	AML	other	m	2021-01-20T15:56:35.25
IV.MTRA.EHE.	ML:1.6	0.000181	1.46	AML	other	m	2021-01-20T15:56:36.11
IV.MTRA.EHN.	ML:1.8	0.0002535	0.96	AML	other	m	2021-01-20T15:56:36.15
IV.LNSS.HHE.	ML:1.5	9.795E-5	0.14	AML	other	m	2021-01-20T15:56:37.51
IV.LNSS.HHN.	ML:1.4	9.145E-5	0.2	AML	other	m	2021-01-20T15:56:37.57
IV.ATCC.EHN.	ML:1.4	8.405E-5	0.9	AML	other	m	2021-01-20T15:56:38.67
IV.ATCC.EHE.	ML:1.4	8.59E-5	1.24	AML	other	m	2021-01-20T15:56:38.13
IV.MOMA.HHN.	ML:1.2	4.675E-5	0.84	AML	other	m	2021-01-20T15:56:38.86
IV.EL6.EHE.	ML:1.6	0.000137	0.18	AML	other	m	2021-01-20T15:56:38.91
IV.FOSV.EHE.	ML:1.3	6.12E-5	0.88	AML	other	m	2021-01-20T15:56:39.63
IV.FOSV.EHN.	ML:1.4	7.25E-5	0.24	AML	other	m	2021-01-20T15:56:39.34
IV.MOMA.HHE.	ML:1.3	6.405E-5	1.38	AML	other	m	2021-01-20T15:56:39.25
IV.SMA1.EHE.	ML:1.3	6.445E-5	1.02	AML	other	m	2021-01-20T15:56:40.87
IV.EL6.EHN.	ML:1.5	9.735E-5	1.42	AML	other	m	2021-01-20T15:56:40.11
IV.RM33.EHN.	ML:1.1	3.32E-5	1.32	AML	other	m	2021-01-20T15:56:41.07
IV.TERO.HHE.	ML:1.3	4.05E-5	0.14	AML	other	m	2021-01-20T15:56:42.37
IV.RM33.EHE.	ML:1.2	4.475E-5	0.54	AML	other	m	2021-01-20T15:56:42.20
IV.SMA1.EHN.	ML:1.3	5.82E-5	0.38	AML	other	m	2021-01-20T15:56:42.75
IV.MNTT.EHN.	ML:1.7	0.000157	0.9	AML	other	m	2021-01-20T15:56:42.46
IV.MNTT.EHE.	ML:2	0.000331	1.84	AML	other	m	2021-01-20T15:56:44.00
IV.SSFR.HHN.	ML:1.6	8.22E-5	1.2	AML	other	m	2021-01-20T15:56:44.13
IV.TERO.HHN.	ML:1.3	3.85E-5	0.42	AML	other	m	2021-01-20T15:56:44.11
IV.ARVD.HHE.	ML:1.1	2.705E-5	1.54	AML	other	m	2021-01-20T15:56:44.02
IV.SSFR.HHE.	ML:1.6	8.08E-5	0.16	AML	other	m	2021-01-20T15:56:45.13
IV.FRON.EHE.	ML:1.2	2.655E-5	0.9	AML	other	m	2021-01-20T15:56:45.48
IV.ARVD.HHN.	ML:1.2	3.02E-5	1	AML	other	m	2021-01-20T15:56:46.61
IV.FRON.EHN.	ML:1.4	3.94E-5	1.16	AML	other	m	2021-01-20T15:56:48.16

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Focal Mechanism in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake with magnitude of ML 1.6 on date 20-01-2021 and time 15:56:23 (UTC) in region 3 km NW Visso (MC)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

The earthquake effects in MCS scale as obtained from the compiled questionnaire

Origin

Uncertainty

Quality

ML:1.6