Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 27-10-2020 and time 08:56:10 (Italy) in region 4 km SW Valle Castellana (TE)

A magnitude ML 1.7 earthquake occured in region: 4 km SW Valle Castellana (TE), on

  • 27-10-2020 07:56:10 (UTC)
  • 27-10-2020 08:56:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7050, 13.4770 at 18 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
Valle Castellana TE 4 977 977
Rocca Santa Maria TE 5 537 1514
Acquasanta Terme AP 9 2916 4430
Cortino TE 10 656 5086
Torricella Sicura TE 16 2641 7727
Arquata del Tronto AP 17 1178 8905
Civitella del Tronto TE 17 5116 14021
Campli TE 17 7209 21230
Crognaleto TE 17 1297 22527
Roccafluvione AP 18 2010 24537
Amatrice RI 18 2657 27194
Fano Adriano TE 18 296 27490
Folignano AP 18 9241 36731
Ascoli Piceno AP 19 49407 86138
Campotosto AQ 19 542 86680
Montorio al Vomano TE 19 8218 94898
Accumoli RI 19 667 95565
Teramo TE 19 54892 150457
Montegallo AP 19 523 150980
Venarotta AP 20 2066 153046

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Teramo (54892 inhabitants)
40 Km N of L'Aquila (69753 inhabitants)
59 Km W of Montesilvano (53738 inhabitants)
66 Km W of Pescara (121014 inhabitants)
69 Km E of Foligno (57155 inhabitants)
69 Km NW of Chieti (51815 inhabitants)
70 Km E of Terni (111501 inhabitants)
99 Km E of Perugia (166134 inhabitants)
99 Km NE of Tivoli (56533 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 1.7 2020-10-27
07:56:10		 42.7052 13.477 18 2021-02-26
14:56:06		 Bollettino Sismico Italiano INGV 84865731
Reviewed
Rev100 		ML 1.8 2020-10-27
07:56:10		 42.7067 13.4733 16 2020-10-27
08:03:40		 Sala Sismica INGV-Roma 84174001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 07:56:10 ± 0.09
Latitude 42.7052 ± 0.0036
Longitude 13.4770 ± 0.0073
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84865731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 569
Semi-minor axis of confidence ellipse (meter) 231
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
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) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.43707
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 84865731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-20 09:14:20

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 84174001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 08:03:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-10-27T07:56:25.83 0.3 undecidable manual S 333 48.2184 101 0.2 70
IV.FDMO.HHZ. 2020-10-27T07:56:25.54 0.6 undecidable manual S 319 48.5181 101 -0.16 46
IV.GUMA.HHZ. 2020-10-27T07:56:24.50 0.6 undecidable manual S 344 41.3253 103 0.68 42
IV.RM33.HNE. 2020-10-27T07:56:21.27 0.6 undecidable manual S 225 30.5472 110 0.2 48
IV.MC2.EHZ. 2020-10-27T07:56:21.88 0.6 undecidable manual S 314 32.745 108 0.26 48
IV.NRCA.HHZ. 2020-10-27T07:56:21.41 0.3 undecidable manual S 296 32.745 108 -0.22 70
IV.MF5.EHZ. 2020-10-27T07:56:21.77 0.3 undecidable manual S 357 31.3464 109 0.5 68
IV.GIGS.HHE. 2020-10-27T07:56:20.51 0.6 undecidable manual S 164 29.0487 111 -0.18 49
IV.MMO1.HNZ. 2020-10-27T07:56:19.46 0.6 undecidable manual S 330 24.753 116 -0.18 47
IV.FDMO.HHZ. 2020-10-27T07:56:18.83 0.1 negative manual P 319 48.5181 101 -0.29 90
IV.GUMA.HHZ. 2020-10-27T07:56:18.12 0.1 undecidable manual P 344 41.3253 103 0.09 96
IV.CAMP.HHE. 2020-10-27T07:56:18.51 0.3 undecidable manual S 196 19.5693 123 0.07 75
IV.CSP1.EHZ. 2020-10-27T07:56:18.89 0.1 undecidable manual P 333 48.2184 101 -0.19 92
IV.T1299.HNN. 2020-10-27T07:56:18.30 0.3 undecidable manual S 244 17.7711 127 0.27 73
IV.SMA1.EHE. 2020-10-27T07:56:17.21 0.3 undecidable manual S 234 14.2746 135 -0.11 74
IV.MF5.EHZ. 2020-10-27T07:56:16.70 0.1 undecidable manual P 357 31.3464 109 0.14 97
IV.TERO.HHZ. 2020-10-27T07:56:16.98 0.3 undecidable manual S 131 13.7751 135 -0.26 73
IV.NRCA.HHZ. 2020-10-27T07:56:16.55 0.1 negative manual P 296 32.745 108 -0.22 94
IV.MC2.EHZ. 2020-10-27T07:56:16.75 0.1 negative manual P 314 32.745 108 -0.01 98
IV.GIGS.HHE. 2020-10-27T07:56:16.10 0.3 undecidable manual P 164 29.0487 111 -0.12 74
IV.RM33.HNE. 2020-10-27T07:56:16.57 0.3 undecidable manual P 225 30.5472 110 0.13 72
IV.CAMP.HHE. 2020-10-27T07:56:15.03 0.1 positive manual P 196 19.5693 123 0.1 99
IV.MTRA.HNZ. 2020-10-27T07:56:15.98 0.3 undecidable manual S 311 8.6802 150 -0.43 69
IV.MMO1.HNZ. 2020-10-27T07:56:15.44 0.1 negative manual P 330 24.753 116 -0.18 96
IV.T1299.HNN. 2020-10-27T07:56:14.86 0.1 positive manual P 244 17.7711 127 0.17 98
IV.SMA1.EHE. 2020-10-27T07:56:14.40 0.1 positive manual P 234 14.2746 135 0.12 100
IV.TERO.HHZ. 2020-10-27T07:56:14.34 0.1 undecidable manual P 131 13.7751 135 0.1 99
IV.MTRA.HNZ. 2020-10-27T07:56:13.64 0.1 negative manual P 311 8.6802 150 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.8 0.0004709087 0.0832 AML other m 2020-10-27T07:56:17.49
IV.TERO.HNE. ML:1.5 0.0002451064 0.1216 AML other m 2020-10-27T07:56:17.57
IV.TERO.HNN. ML:1.8 0.0005462971 0.0704 AML other m 2020-10-27T07:56:17.49
IV.TERO.HHE. ML:1.4 0.0001964448 0.1408 AML other m 2020-10-27T07:56:17.57
IV.NRCA.HHN. ML:1.8 0.0002332615 0.1024 AML other m 2020-10-27T07:56:21.99
IV.NRCA.HNE. ML:1.8 0.00025734615 0.1472 AML other m 2020-10-27T07:56:21.59
IV.NRCA.HHE. ML:1.9 0.00028683695 0.1408 AML other m 2020-10-27T07:56:21.59
IV.NRCA.HNN. ML:1.8 0.00023085549999999998 0.1216 AML other m 2020-10-27T07:56:22.27
IV.GUMA.HHN. ML:1.6 0.00012687145 0.3392 AML other m 2020-10-27T07:56:26.02
IV.GUMA.HNE. ML:1.6 0.00012627506 0.3776 AML other m 2020-10-27T07:56:25.12
IV.CSP1.EHN. ML:1.6 0.00010604725 1.2992 AML other m 2020-10-27T07:56:25.88
IV.CSP1.EHE. ML:1.7 0.00013908058000000002 0.32 AML other m 2020-10-27T07:56:26.20
IV.FDMO.HHE. ML:1.2 0.000040247420000000005 0.1856 AML other m 2020-10-27T07:56:26.20
IV.FDMO.HHN. ML:1.4 0.00005986458 0.2432 AML other m 2020-10-27T07:56:26.06
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