Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-04-2020 and time 09:18:53 (UTC) in region 6 km E Cittareale (RI)

A magnitude ML 1.4 earthquake occured in region: 6 km E Cittareale (RI), on

  • 18-04-2020 09:18:53 (UTC)
  • 18-04-2020 11:18:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5960, 13.2290 at 15 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 6 482 482
Amatrice RI 6 2657 3139
Montereale AQ 8 2581 5720
Capitignano AQ 10 665 6385
Accumoli RI 11 667 7052
Borbona RI 12 617 7669
Campotosto AQ 12 542 8211
Posta RI 13 694 8905
Cagnano Amiterno AQ 15 1369 10274
Barete AQ 17 737 11011
Pizzoli AQ 19 4326 15337

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
78 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
82 Km W of Chieti (51815 inhabitants)
82 Km W of Pescara (121014 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
99 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 1.4 2020-04-18
09:18:53		 42.596 13.2292 15 2020-07-18
21:08:37		 Bollettino Sismico Italiano INGV 79397551
Reviewed
Rev100 		ML 1.5 2020-04-18
09:18:53		 42.6018 13.224 16 2020-04-18
09:29:41		 Sala Sismica INGV-Roma 78352241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-18 09:18:53 ± 0.08
Latitude 42.5960 ± 0.0045
Longitude 13.2292 ± 0.0049
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79397551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 389
Semi-minor axis of confidence ellipse (meter) 258
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47304
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 79397551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-21 07:28:22

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 78352241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-18 09:29:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.VNF1.HGZ. 2020-04-18T09:19:35.46 3.0 undecidable manual Sg 0.26 0
IV.ATVO.HHZ. 2020-04-18T09:19:26.15 3.0 undecidable manual S -0.06 0
IV.LRP.EHZ. 2020-04-18T09:19:10.21 3.0 undecidable manual P -2.86 0
IV.CESI.HHE. 2020-04-18T09:19:10.37 0.6 undecidable manual S 330 52.503 96 0.17 45
IV.FDMO.HHN. 2020-04-18T09:19:09.89 0.6 undecidable manual S 347 50.2164 97 0.29 44
IV.FIAM.HNN. 2020-04-18T09:19:06.54 0.3 undecidable manual S 194 37.5291 100 0.29 70
IV.GIGS.HHZ. 2020-04-18T09:19:05.01 0.6 undecidable manual S 119 32.2455 102 0.14 48
IV.TERO.HHZ. 2020-04-18T09:19:04.38 0.6 undecidable manual S 84 30.747 103 -0.09 48
IV.NRCA.HNZ. 2020-04-18T09:19:03.92 0.3 undecidable manual S 340 27.9498 105 0.17 71
IV.CESI.HHE. 2020-04-18T09:19:03.04 0.3 undecidable manual P 330 52.503 96 -0.18 69
IV.MTRA.HNZ. 2020-04-18T09:19:02.00 0.3 undecidable manual S 37 22.4553 111 -0.35 70
IV.FDMO.HHN. 2020-04-18T09:19:02.75 0.3 undecidable manual P 347 50.2164 97 -0.12 70
IV.TERO.HHZ. 2020-04-18T09:19:00.01 1.0 negative manual P 84 30.747 103 0.1 24
IV.LNSS.HHZ. 2020-04-18T09:19:00.43 0.6 undecidable manual S 273 15.4734 124 -0.26 48
IV.GIGS.HHZ. 2020-04-18T09:19:00.24 0.6 negative manual P 119 32.2455 102 0.1 48
IV.FIAM.HNN. 2020-04-18T09:19:00.40 0.6 undecidable manual P 194 37.5291 100 -0.53 42
IV.CAMP.HHZ. 2020-04-18T09:19:00.99 0.6 undecidable manual S 114 16.1727 123 0.14 49
IV.RM33.EHZ. 2020-04-18T09:18:59.58 0.6 undecidable manual S 187 9.6792 141 0.01 51
IV.SMA1.EHZ. 2020-04-18T09:18:59.62 0.6 undecidable manual S 66 9.4794 141 0.1 50
IV.NRCA.HNZ. 2020-04-18T09:18:59.41 0.1 undecidable manual P 340 27.9498 105 -0.08 98
IV.T1299.HNZ. 2020-04-18T09:18:58.97 0.6 undecidable manual S 46 6.0939 154 -0.07 51
IV.MTRA.HNZ. 2020-04-18T09:18:58.66 0.3 undecidable manual P 37 22.4553 111 -0.03 75
IV.SMA1.EHZ. 2020-04-18T09:18:57.35 0.1 negative manual P 66 9.4794 141 0.3 96
IV.CAMP.HHZ. 2020-04-18T09:18:57.44 0.1 undecidable manual P 114 16.1727 123 -0.38 92
IV.LNSS.HHZ. 2020-04-18T09:18:57.80 0.1 positive manual P 273 15.4734 124 0.08 99
IV.RM33.EHZ. 2020-04-18T09:18:57.26 1.0 undecidable manual P 187 9.6792 141 0.19 25
IV.T1299.HNZ. 2020-04-18T09:18:56.88 0.1 undecidable manual P 46 6.0939 154 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNN. ML:1.2 0.0001534975 0.1536 AML other m 2020-04-18T09:18:59.64
IV.RM33.EHN. ML:1.0 0.000105282665 0.0576 AML other m 2020-04-18T09:18:59.77
IV.RM33.HNE. ML:1.2 0.000148161855 0.1152 AML other m 2020-04-18T09:18:59.87
IV.RM33.EHE. ML:1.2 0.0001384124 0.1216 AML other m 2020-04-18T09:18:59.87
IV.SMA1.EHN. ML:1.3 0.00020177605 0.096 AML other m 2020-04-18T09:18:59.80
IV.SMA1.EHE. ML:1.8 0.0005625939499999999 0.2752 AML other m 2020-04-18T09:18:59.91
IV.LNSS.HNE. ML:1.5 0.00022680995 0.1024 AML other m 2020-04-18T09:19:00.64
IV.LNSS.HHE. ML:1.6 0.0002781598 0.1024 AML other m 2020-04-18T09:19:00.64
IV.LNSS.HNN. ML:1.6 0.0002946319 0.1216 AML other m 2020-04-18T09:19:00.65
IV.LNSS.HHN. ML:1.6 0.00030514765 0.1216 AML other m 2020-04-18T09:19:00.65
IV.TERO.HHN. ML:1.0 0.00004723703999999999 0.0576 AML other m 2020-04-18T09:19:04.54
IV.TERO.HHE. ML:1.1 0.00004793214 0.1408 AML other m 2020-04-18T09:19:04.54
IV.NRCA.HHN. ML:1.6 0.00017718045 0.096 AML other m 2020-04-18T09:19:04.79
IV.NRCA.HNN. ML:1.6 0.000175311495 0.1024 AML other m 2020-04-18T09:19:04.79
IV.NRCA.HNE. ML:1.7 0.0002334001 0.0896 AML other m 2020-04-18T09:19:11.00
IV.NRCA.HHE. ML:1.8 0.0002661531 0.0768 AML other m 2020-04-18T09:19:11.01
IV.TERO.HNN. ML:1.7 0.00020214004999999998 1.0304 AML other m 2020-04-18T09:19:12.62
IV.TERO.HNE. ML:1.4 0.000114214 0.9472 AML other m 2020-04-18T09:19:13.87
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