Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-10-2020 and time 06:20:52 (UTC) in region 3 km S Cittareale (RI)

A magnitude ML 1.6 earthquake occured in region: 3 km S Cittareale (RI), on

  • 27-10-2020 06:20:52 (UTC)
  • 27-10-2020 07:20:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5910, 13.1720 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
Cittareale RI 3 482 482
Borbona RI 9 617 1099
Montereale AQ 10 2581 3680
Posta RI 10 694 4374
Amatrice RI 11 2657 7031
Capitignano AQ 13 665 7696
Accumoli RI 13 667 8363
Cagnano Amiterno AQ 15 1369 9732
Campotosto AQ 17 542 10274
Leonessa RI 17 2435 12709
Barete AQ 18 737 13446
Micigliano RI 18 127 13573
Cascia PG 19 3217 16790
Monteleone di Spoleto PG 19 599 17389
Pizzoli AQ 20 4326 21715

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of L'Aquila (69753 inhabitants)
43 Km E of Terni (111501 inhabitants)
44 Km W of Teramo (54892 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
76 Km NE of Tivoli (56533 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
86 Km W of Chieti (51815 inhabitants)
87 Km W of Pescara (121014 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
96 Km NE of Roma (2864731 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 1.6 2020-10-27
06:20:52		 42.5913 13.1717 12 2021-02-26
14:56:06		 Bollettino Sismico Italiano INGV 84865411
Reviewed
Rev100 		ML 1.6 2020-10-27
06:20:52		 42.5917 13.1623 12 2020-10-27
06:30:26		 Sala Sismica INGV-Roma 84172421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 06:20:52 ± 0.07
Latitude 42.5913 ± 0.0036
Longitude 13.1717 ± 0.0049
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 84865411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 440
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.08813
Epicentral distance of station farthest from the epicenter (degree) 0.44876
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 84865411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-20 08:24:30

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 84172421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 06:30:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHN. 2020-10-27T06:21:04.10 0.6 undecidable manual S 84 35.4423 92 -0.34 45
IV.ARRO.EHZ. 2020-10-27T06:21:04.00 0.6 undecidable manual S 268 33.1446 92 0.17 47
IV.MC2.EHZ. 2020-10-27T06:21:04.70 0.3 undecidable manual S 2 35.5422 92 0.24 71
IV.GIGS.HHN. 2020-10-27T06:21:04.30 0.6 undecidable manual S 115 36.2415 92 -0.34 45
IV.MMO1.EHZ. 2020-10-27T06:21:04.80 0.3 undecidable manual S 20 36.4413 92 0.1 73
IV.MF5.EHN. 2020-10-27T06:21:02.12 0.3 undecidable manual P 28 49.8168 91 0.5 65
IV.MTRA.EHE. 2020-10-27T06:21:01.60 0.3 undecidable manual S 45 25.9518 93 -0.3 68
IV.NRCA.HHZ. 2020-10-27T06:21:01.80 0.3 undecidable manual S 350 27.2505 93 -0.45 66
IV.CAMP.HHE. 2020-10-27T06:21:00.40 0.3 undecidable manual S 108 20.3685 96 -0.01 74
IV.GIGS.HHN. 2020-10-27T06:20:59.40 0.6 undecidable manual P 115 36.2415 92 -0.12 47
IV.MC2.EHZ. 2020-10-27T06:20:59.44 0.1 undecidable manual P 2 35.5422 92 0.03 97
IV.MMO1.EHZ. 2020-10-27T06:20:59.37 0.1 undecidable manual P 20 36.4413 92 -0.18 93
IV.TERO.HHN. 2020-10-27T06:20:59.31 0.3 undecidable manual P 84 35.4423 92 -0.09 71
IV.SMA1.EHZ. 2020-10-27T06:20:58.90 0.3 undecidable manual S 72 14.0748 108 0.14 75
IV.ARRO.EHZ. 2020-10-27T06:20:58.80 0.1 undecidable manual P 268 33.1446 92 -0.25 93
IV.CAMP.HHE. 2020-10-27T06:20:57.28 0.1 undecidable manual P 108 20.3685 96 0.2 97
IV.MTRA.EHE. 2020-10-27T06:20:57.86 0.1 undecidable manual P 45 25.9518 93 -0.08 96
IV.LNSS.HHZ. 2020-10-27T06:20:57.80 0.3 undecidable manual S 277 10.7781 122 -0.17 74
IV.NRCA.HHZ. 2020-10-27T06:20:57.98 0.1 undecidable manual P 350 27.2505 93 -0.16 95
IV.RM33.EHZ. 2020-10-27T06:20:57.60 0.3 undecidable manual S 159 9.7791 126 -0.15 74
IV.T1299.HNN. 2020-10-27T06:20:57.80 0.6 undecidable manual S 62 10.1787 124 -0.04 50
IV.SMA1.EHZ. 2020-10-27T06:20:56.45 0.1 undecidable manual P 72 14.0748 108 0.33 96
IV.LNSS.HHZ. 2020-10-27T06:20:55.76 0.1 undecidable manual P 277 10.7781 122 0.09 100
IV.RM33.EHZ. 2020-10-27T06:20:55.73 0.1 undecidable manual P 159 9.7791 126 0.19 98
IV.T1299.HNN. 2020-10-27T06:20:55.87 0.1 positive manual P 62 10.1787 124 0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNE. ML:1.2 0.0001991606 0.1696 AML other m 2020-10-27T06:20:58.77
IV.RM33.EHE. ML:1.2 0.00018488440000000001 0.16 AML other m 2020-10-27T06:20:58.69
IV.RM33.EHN. ML:1.4 0.00029163050000000003 0.2592 AML other m 2020-10-27T06:20:57.78
IV.RM33.HNN. ML:1.4 0.00027020414999999996 0.2688 AML other m 2020-10-27T06:20:57.78
IV.LNSS.HNE. ML:2.1 0.001432218 0.128 AML other m 2020-10-27T06:20:58.10
IV.LNSS.HNN. ML:1.8 0.00073402625 0.1696 AML other m 2020-10-27T06:20:58.64
IV.LNSS.HHE. ML:2.1 0.0015397064999999998 0.1216 AML other m 2020-10-27T06:20:58.10
IV.LNSS.HHN. ML:1.9 0.00080165915 0.1824 AML other m 2020-10-27T06:20:58.64
IV.SMA1.EHN. ML:1.4 0.00021713905 0.2208 AML other m 2020-10-27T06:20:59.31
IV.SMA1.EHE. ML:1.4 0.00024335009999999999 0.2816 AML other m 2020-10-27T06:20:59.41
IV.NRCA.HHN. ML:1.5 0.00018130879999999998 0.1376 AML other m 2020-10-27T06:21:02.11
IV.NRCA.HNE. ML:1.8 0.0003533015 0.16 AML other m 2020-10-27T06:21:02.10
IV.NRCA.HHE. ML:1.8 0.00036006675 0.1792 AML other m 2020-10-27T06:21:02.10
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