Earthquake 4 km E Monte Cavallo (MC), Magnitude ML 0.9, 17 January 2021 time 17:56:45 (Timezone UTC)

A magnitude ML 0.9 earthquake occured in region: 4 km E Monte Cavallo (MC), on

17-01-2021 17:56:45 (UTC)
17-01-2021 18:56:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.98, 13.05 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
Monte Cavallo	MC	4	145	145
Visso	MC	6	1107	1252
Pieve Torina	MC	7	1458	2710
Fiordimonte	MC	7	202	2912
Ussita	MC	9	444	3356
Pievebovigliana	MC	10	866	4222
Fiastra	MC	11	559	4781
Preci	PG	11	724	5505
Muccia	MC	12	915	6420
Acquacanina	MC	12	121	6541
Serravalle di Chienti	MC	13	1070	7611
Castelsantangelo sul Nera	MC	13	281	7892
Sellano	PG	14	1079	8971
Bolognola	MC	15	142	9113
Camerino	MC	18	6974	16087

Municipalities with at least 50000 inhabitants

An earthquake occurred to

28 Km E of Foligno (57155 inhabitants)

55 Km E of Perugia (166134 inhabitants)

57 Km NE of Terni (111501 inhabitants)

64 Km NW of Teramo (54892 inhabitants)

76 Km NW of L'Aquila (69753 inhabitants)

81 Km SW of Ancona (100861 inhabitants)

96 Km S of Fano (60888 inhabitants)

99 Km NE of Viterbo (67173 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 0.9	2021-01-17 17:56:45	42.98	13.05	11	2021-01-17 18:05:04	Sala Sismica INGV-Roma	86334421

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2021-01-17 17:56:45 ± 0.05
Latitude	42.98 ± 0.00
Longitude	13.05 ± 0.00
Depth (km)	11 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	100 -> SURVEY-INGV
Event type	earthquake
Origin ID	86334421

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	349
Semi-minor axis of confidence ellipse (meter)	241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	354
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)	173
Number of associated phases, regardless of their use for origin computation	28
Number of defining phases	8
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
Epicentral distance of station farthest from the epicenter (degree)	0.22033
Number of stations at which the event was observed	21
Number of stations from which data was used for origin computation	4

Magnitude information

ML:0.9

Field	Value
Value	0.9
Uncertainty	0.4
Num. used stations	13
Type of magnitude	ML
Reference to an origin	86334421
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2021-01-17 18:05:04

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance	Takeoff_angle	Residual	Weight
ST.CARE.EHZ.	2021-01-17T17:58:26.03	3.0	undecidable	manual	Sg				7.62	0
IV.ZONE.HHZ.	2021-01-17T17:58:18.21	3.0	undecidable	manual	Sg				10.05	0
MN.BNI.HHZ.	2021-01-17T17:58:05.40	3.0	negative	manual	Pg				17.23	0
IV.SENA.HHZ.	2021-01-17T17:58:03.93	3.0	undecidable	manual	Sn				-9.99	0
IV.CRJA.HHZ.	2021-01-17T17:58:00.59	3.0	positive	manual	Pn				2.37	0
IV.PIPA.HHZ.	2021-01-17T17:57:57.45	3.0	negative	manual	Pg				4.47	0
IV.VOBA.HNZ.	2021-01-17T17:57:56.14	3.0	undecidable	manual	Sn				-6.14	0
IV.NDIM.HNZ.	2021-01-17T17:57:47.06	3.0	undecidable	manual	Sg				4.2	0
IV.PTRJ.HNZ.	2021-01-17T17:57:45.67	3.0	undecidable	manual	Sn				-3.12	0
IV.CDRU.HHZ.	2021-01-17T17:57:41.39	3.0	undecidable	manual	Pg				9.26	0
ST.CARE.EHZ.	2021-01-17T17:57:34.74	3.0	negative	manual	Pn				0.33	0
IV.PTRJ.HNZ.	2021-01-17T17:57:23.25	3.0	undecidable	manual	Pg				5.48	0
IV.FIR.HHZ.	2021-01-17T17:57:11.70	3.0	undecidable	manual	S				-5.6	0
IV.SENI.EHZ.	2021-01-17T17:56:56.58	3.0	positive	manual	P				-0.07	0
IV.MNTT.EHZ.	2021-01-17T17:56:55.98	3.0	undecidable	manual	P					0
IV.MMO1.EHZ.	2021-01-17T17:56:54.09	0.3	undecidable	manual	S	111	0.2203	91	0.02	74
IV.RIBO.EHZ.01	2021-01-17T17:56:54.06	3.0	undecidable	manual	P				-4.33	0
IV.ASSB.HHZ.	2021-01-17T17:56:52.40	3.0	undecidable	manual	P					0
IV.ASSB.HHZ.	2021-01-17T17:56:52.38	3.0	undecidable	manual	S					0
IV.CSP1.EHZ.	2021-01-17T17:56:52.28	0.3	undecidable	manual	S	46	0.161	92	-0.03	75
IV.RM33.HNZ.	2021-01-17T17:56:51.73	3.0	undecidable	manual	Pn				-4.02	0
IV.MMO1.EHZ.	2021-01-17T17:56:50.23	0.1	undecidable	manual	P	111	0.2203	91	-0.04	98
IV.CESI.HHZ.	2021-01-17T17:56:50.79	0.3	undecidable	manual	S	284	0.107	111	0.05	75
IV.ARVD.HHZ.	2021-01-17T17:56:49.30	3.0	undecidable	manual	P				-1.84	0
IV.FDMO.HHZ.	2021-01-17T17:56:49.60	0.3	undecidable	manual	S	28	0.0639	136	-0.08	75
IV.CSP1.EHZ.	2021-01-17T17:56:49.29	0.1	undecidable	manual	P	46	0.161	92	0.03	100
IV.CESI.HHZ.	2021-01-17T17:56:48.26	0.1	undecidable	manual	P	284	0.107	111	-0.09	100
IV.FDMO.HHZ.	2021-01-17T17:56:47.85	0.1	undecidable	manual	P	28	0.0639	136	0.11	100

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.RM33.HNN.	ML:2.6	0.00106029595	1.0496	AML	other	m	2021-01-17T17:57:20.64
IV.RM33.HNE.	ML:2.7	0.0012417145	0.6144	AML	other	m	2021-01-17T17:57:12.65
IV.PTRJ.HNE.	ML:3.7	0.0012427772	0.1024	AML	other	m	2021-01-17T17:57:58.53
IV.PTRJ.HNN.	ML:3.8	0.00148448235	0.192	AML	other	m	2021-01-17T17:57:58.53
ST.CARE.EHE.	ML:5.6	0.020996585	0.0768	AML	other	m	2021-01-17T17:58:50.45
ST.CARE.EHN.	ML:5.4	0.0139834745	0.0768	AML	other	m	2021-01-17T17:58:50.63
IV.FDMO.HHE.	ML:0.3	3.055626E-5	0.0768	AML	other	m	2021-01-17T17:56:49.82
IV.FDMO.HHN.	ML:0.5	4.7298415E-5	0.1152	AML	other	m	2021-01-17T17:56:49.70
IV.CESI.HNE.	ML:1	0.000121721115	0.9728	AML	other	m	2021-01-17T17:56:51.12
IV.CESI.HNN.	ML:1.1	0.00012462204	0.4992	AML	other	m	2021-01-17T17:57:00.44
IV.CESI.HHE.	ML:0.4	2.55136E-5	1.4848	AML	other	m	2021-01-17T17:57:01.75
IV.CESI.HHN.	ML:0.3	2.1490275E-5	0.1152	AML	other	m	2021-01-17T17:56:51.01
IV.CSP1.EHE.	ML:1.1	9.67859E-5	2.4704	AML	other	m	2021-01-17T17:57:02.46
IV.CSP1.EHN.	ML:1.2	0.000128689335	2.3936	AML	other	m	2021-01-17T17:56:48.58
IV.ARVD.HHE.	ML:1	1.9602535E-5	1.2928	AML	other	m	2021-01-17T17:57:16.30
IV.ARVD.HHN.	ML:1.1	2.328178E-5	1.3952	AML	other	m	2021-01-17T17:57:09.38
IV.RM33.EHE.	ML:1.4	5.977148E-5	1.5232	AML	other	m	2021-01-17T17:57:15.32
IV.RM33.EHN.	ML:1.3	4.63618E-5	1.28	AML	other	m	2021-01-17T17:57:18.76
IV.ASSB.HHE.	ML:1.2	6.530379E-5	0.0512	AML	other	m	2021-01-17T17:56:52.50
IV.ASSB.HHN.	ML:0.8	2.64297195E-5	0.0512	AML	other	m	2021-01-17T17:56:52.52
IV.RIBO.EHE.01	ML:2.4	9.7788325E-5	1.5744	AML	other	m	2021-01-17T17:57:27.20
IV.MNTT.EHN.	ML:1.5	8.8685815E-5	0.1664	AML	other	m	2021-01-17T17:57:04.31
IV.MNTT.EHE.	ML:1.9	0.00023388335	0.1664	AML	other	m	2021-01-17T17:57:04.39
IV.SENI.EHE.	ML:1.8	8.8926445E-5	0.64	AML	other	m	2021-01-17T17:57:34.54
IV.SENI.EHN.	ML:1.8	9.6798E-5	0.64	AML	other	m	2021-01-17T17:57:28.48
IV.SENI.HNE.	ML:2.7	0.00066589795	0.1152	AML	other	m	2021-01-17T17:57:04.79
IV.SENI.HNN.	ML:2.8	0.00091162385	0.2816	AML	other	m	2021-01-17T17:56:56.51
IV.PTRJ.HHN.	ML:3.7	0.001369081	0.0896	AML	other	m	2021-01-17T17:58:06.68
IV.PTRJ.HHE.	ML:3.1	0.00034495385	0.1024	AML	other	m	2021-01-17T17:57:52.43
ST.CARE.HNN.	ML:4	0.0005476349	1.1776	AML	other	m	2021-01-17T17:58:33.35
ST.CARE.HNE.	ML:4.2	0.00078978231	0.5888	AML	other	m	2021-01-17T17:58:05.22

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 0.9 on date 17-01-2021 and time 17:56:45 (UTC) in region 4 km E Monte Cavallo (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:0.9