Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-01-2021 and time 17:45:45 (UTC) in region 7 km E Borgorose (RI)

A magnitude ML 1.5 earthquake occured in region: 7 km E Borgorose (RI), on

  • 21-01-2021 17:45:45 (UTC)
  • 21-01-2021 18:45:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.17, 13.32 at 10 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
Borgorose RI 7 4591 4591
Massa d'Albe AQ 9 1476 6067
Magliano de' Marsi AQ 10 3690 9757
Scurcola Marsicana AQ 12 2824 12581
Sante Marie AQ 12 1166 13747
Tagliacozzo AQ 13 6889 20636
Tornimparte AQ 13 3187 23823
Lucoli AQ 13 1011 24834
Pescorocchiano RI 14 2075 26909
Rocca di Cambio AQ 16 533 27442
Ovindoli AQ 17 1227 28669
Rocca di Mezzo AQ 17 1526 30195
Ocre AQ 18 1167 31362
Avezzano AQ 18 42515 73877
Cappadocia AQ 19 528 74405
Fiamignano RI 19 1413 75818
Fossa AQ 20 721 76539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of L'Aquila (69753 inhabitants)
49 Km E of Tivoli (56533 inhabitants)
52 Km E of Guidonia Montecelio (88673 inhabitants)
63 Km SW of Teramo (54892 inhabitants)
70 Km SE of Terni (111501 inhabitants)
70 Km NE of Velletri (53303 inhabitants)
73 Km W of Chieti (51815 inhabitants)
76 Km E of Roma (2864731 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
85 Km NE of Aprilia (73446 inhabitants)
86 Km NE of Latina (125985 inhabitants)
88 Km NE of Pomezia (62966 inhabitants)
99 Km NE of Anzio (54211 inhabitants)
100 Km E of Fiumicino (78395 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

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 1.5 2021-01-21
17:45:45		 42.17 13.32 10 2021-01-21
17:57:33		 Sala Sismica INGV-Roma 86438981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 17:45:45 ± 0.05
Latitude 42.17 ± 0.00
Longitude 13.32 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86438981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 270
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 270
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 16
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
Epicentral distance of station farthest from the epicenter (degree) 0.46405
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 86438981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 17:57:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NOV.HHZ. 2021-01-21T17:47:42.27 3.0 undecidable manual Sn 4.71 0
IV.MNTV.HNZ. 2021-01-21T17:47:28.35 3.0 undecidable manual Sg 12.88 0
IV.SBPO.HNZ. 2021-01-21T17:47:13.93 3.0 undecidable manual Sn 1.68 0
IV.RESU.HHZ. 2021-01-21T17:47:06.91 3.0 undecidable manual Pg 17.07 0
ST.CARE.EHZ. 2021-01-21T17:47:00.47 3.0 negative manual Pg 9.45 0
IV.CAPR.HNZ. 2021-01-21T17:46:47.88 3.0 undecidable manual Pn 2.66 0
IV.PIPA.HHZ. 2021-01-21T17:46:42.53 3.0 negative manual Pn 2.79 0
IV.MCRV.HHZ. 2021-01-21T17:46:39.13 3.0 undecidable manual Sn -0.44 0
IX.MNT3.HHZ.02 2021-01-21T17:46:36.63 3.0 undecidable manual Sn 0.14 0
IV.FIR.HHZ. 2021-01-21T17:46:20.77 3.0 undecidable manual Pn 3.62 0
IV.CPGN.EHZ. 2021-01-21T17:46:11.06 3.0 undecidable manual Pn -0.64 0
IV.INTR.HHZ. 2021-01-21T17:46:01.44 0.6 undecidable manual S 110 0.4641 50 -0.2 60
IV.TOLF.HHZ. 2021-01-21T17:46:00.16 3.0 undecidable manual P 0.17 0
IV.VVLD.HHZ. 2021-01-21T17:45:59.46 0.6 undecidable manual S 143 0.3786 50 0.35 60
IV.FAGN.HHZ. 2021-01-21T17:45:54.58 0.6 undecidable manual S 65 0.2176 50 0.24 63
IV.TERO.HHZ. 2021-01-21T17:45:54.46 3.0 undecidable manual P -0.35 0
IV.MTCE.HHZ. 2021-01-21T17:45:54.48 1.0 undecidable manual P 251 0.4533 50 -0.05 31
IV.INTR.HHZ. 2021-01-21T17:45:54.62 0.3 negative manual P 110 0.4641 50 -0.1 93
IV.VVLD.HHZ. 2021-01-21T17:45:53.19 0.6 negative manual P 143 0.3786 50 -0.06 63
MN.AQU.HHZ. 2021-01-21T17:45:53.47 0.6 undecidable manual S 19 0.1916 116 0.02 66
IT.CSO1.HGZ. 2021-01-21T17:45:53.30 0.6 undecidable manual S 247 0.1853 116 0.08 66
IV.T0110.HHZ. 2021-01-21T17:45:52.71 0.3 positive manual P 80 0.3435 50 0.05 96
IV.PTQR.HHZ. 2021-01-21T17:45:52.39 0.3 undecidable manual S 158 0.1628 119 -0.07 100
IV.FIAM.HHZ. 2021-01-21T17:45:52.91 0.6 undecidable manual S 303 0.1763 118 -0.01 67
IV.FAGN.HHZ. 2021-01-21T17:45:50.02 1.0 undecidable manual P 65 0.2176 50 -0.48 30
MN.AQU.HHZ. 2021-01-21T17:45:50.02 0.6 undecidable manual P 19 0.1916 116 0.03 66
IV.PTQR.HHZ. 2021-01-21T17:45:49.42 0.3 positive manual P 158 0.1628 119 0.01 100
IV.FIAM.HHZ. 2021-01-21T17:45:49.59 1.0 undecidable manual P 303 0.1763 118 -0.09 33
IT.CSO1.HGZ. 2021-01-21T17:45:49.87 0.6 undecidable manual P 247 0.1853 116 0.02 67
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHN. ML:1.5 0.0002765427 0.2176 AML other m 2021-01-21T17:45:52.45
IV.PTQR.HHE. ML:1.7 0.000401 0.38 AML other m 2021-01-21T17:45:52.78
IV.FIAM.HHE. ML:0.9 6.7386735E-5 0.064 AML other m 2021-01-21T17:45:53.20
IV.FIAM.HHN. ML:0.9 6.464811E-5 0.128 AML other m 2021-01-21T17:45:54.84
IV.FAGN.HHN. ML:1.5 0.000207 1.68 AML other m 2021-01-21T17:45:56.00
IV.FAGN.HHE. ML:1.6 0.00022698565 0.4608 AML other m 2021-01-21T17:45:59.12
IV.INTR.HHE. ML:1.2 4.3482645E-5 1.0624 AML other m 2021-01-21T17:46:16.23
IV.VVLD.HHN. ML:1 2.9360895E-5 0.8192 AML other m 2021-01-21T17:46:07.76
IV.VVLD.HHE. ML:1 2.83903655E-5 0.256 AML other m 2021-01-21T17:46:03.03
IV.INTR.HHN. ML:1.3 5.558026E-5 0.4992 AML other m 2021-01-21T17:46:05.37
IV.CPGN.HNE. ML:2.6 0.00011052013 0.768 AML other m 2021-01-21T17:46:30.92
IV.CPGN.HNN. ML:2.8 0.00017753425 0.8448 AML other m 2021-01-21T17:46:42.60
IV.CPGN.EHE. ML:2.2 5.2477615E-5 0.2432 AML other m 2021-01-21T17:47:02.35
IV.CPGN.EHN. ML:2.2 4.404674E-5 0.2304 AML other m 2021-01-21T17:46:59.84
IV.FIAM.HNE. ML:1.8 0.000435162 0.3712 AML other m 2021-01-21T17:45:53.34
IV.FIAM.HNN. ML:1.2 0.00012748138 0.2048 AML other m 2021-01-21T17:45:53.45
IV.T0110.HHE. ML:1.3 7.4734095E-5 0.4352 AML other m 2021-01-21T17:46:03.46
IV.T0110.HHN. ML:1.4 9.2609525E-5 0.3584 AML other m 2021-01-21T17:46:00.06
IV.VVLD.HNE. ML:1.6 0.0001207559 0.6912 AML other m 2021-01-21T17:46:00.44
IV.VVLD.HNN. ML:1.6 0.00011965355 1.088 AML other m 2021-01-21T17:46:00.70
IV.TERO.HHE. ML:0.8 1.569276E-5 0.2944 AML other m 2021-01-21T17:46:07.28
IV.TERO.HHN. ML:1 2.32433E-5 0.7808 AML other m 2021-01-21T17:46:13.63
IV.TERO.HNE. ML:1.7 0.000118763125 1.1264 AML other m 2021-01-21T17:46:15.14
IV.TERO.HNN. ML:1.8 0.0001558958 0.896 AML other m 2021-01-21T17:46:12.01
IV.MTCE.HHE. ML:1.8 0.00014826875 0.6016 AML other m 2021-01-21T17:45:53.95
IV.MTCE.HHN. ML:1.6 9.726456E-5 0.704 AML other m 2021-01-21T17:46:01.00
IV.INTR.HNE. ML:1.7 0.00012239055 0.9216 AML other m 2021-01-21T17:46:13.52
IV.INTR.HNN. ML:1.8 0.00016329785 1.0752 AML other m 2021-01-21T17:46:00.54
IV.TOLF.HHE. ML:2 8.0335525E-5 0.8192 AML other m 2021-01-21T17:46:08.11
IV.TOLF.HHN. ML:1.9 6.84727E-5 1.6256 AML other m 2021-01-21T17:46:30.64
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download