Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 17-03-2020 and time 22:40:18 (Italy) in region 4 km SW Ciampino (RM)

A magnitude ML 1.5 earthquake occured in region: 4 km SW Ciampino (RM), on

  • 17-03-2020 21:40:18 (UTC)
  • 17-03-2020 22:40:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7850, 12.5580 at 11 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
Ciampino RM 4 38412 38412
Marino RM 9 43026 81438
Castel Gandolfo RM 9 8997 90435
Grottaferrata RM 9 20327 110762
Albano Laziale RM 10 41715 152477
Frascati RM 11 22087 174564
Ariccia RM 12 19407 193971
Rocca di Papa RM 13 17034 211005
Pomezia RM 14 62966 273971
Roma RM 14 2864731 3138702
Monte Porzio Catone RM 14 8693 3147395
Genzano di Roma RM 14 23970 3171365
Nemi RM 15 1943 3173308
Monte Compatri RM 15 11978 3185286
Lanuvio RM 17 13632 3198918
Colonna RM 17 4287 3203205
Rocca Priora RM 17 11962 3215167
Ardea RM 20 49183 3264350

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SE of Roma (2864731 inhabitants)
14 Km NE of Pomezia (62966 inhabitants)
21 Km NW of Velletri (53303 inhabitants)
22 Km NW of Aprilia (73446 inhabitants)
27 Km E of Fiumicino (78395 inhabitants)
28 Km SW of Guidonia Montecelio (88673 inhabitants)
28 Km SW of Tivoli (56533 inhabitants)
38 Km N of Anzio (54211 inhabitants)
46 Km NW of Latina (125985 inhabitants)
72 Km E of Civitavecchia (52991 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
87 Km S of Terni (111501 inhabitants)
94 Km SW of L'Aquila (69753 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 1.5 2020-03-17
21:40:18		 41.785 12.5583 11 2020-07-18
21:08:37		 Bollettino Sismico Italiano INGV 79413581
Reviewed
Rev100 		ML 1.6 2020-03-17
21:40:18		 41.789 12.5578 11 2020-03-17
21:49:57		 Sala Sismica INGV-Roma 77332941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-17 21:40:18 ± 0.09
Latitude 41.7850 ± 0.0108
Longitude 12.5583 ± 0.0109
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79413581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1310
Semi-minor axis of confidence ellipse (meter) 750
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 23
Circular confidence region, given by single value of horizontal uncertainty (meter) 1310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 168
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.50002
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 79413581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-16 21:54:14

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 77332941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-17 21:49:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHZ. 2020-03-17T21:40:30.79 0.3 undecidable manual S 62 39.4272 90 -0.35 68
IV.TOLF.HHZ. 2020-03-17T21:40:28.47 0.6 undecidable manual P 304 55.5 90 0.33 45
IV.MTCE.HHZ. 2020-03-17T21:40:28.55 0.3 undecidable manual S 30 30.4473 90 -0.2 70
IV.SRES.HHN. 2020-03-17T21:40:27.96 0.6 undecidable manual P 355 50.3163 90 0.63 42
IV.CERT.HHZ. 2020-03-17T21:40:25.43 0.1 undecidable manual P 62 39.4272 90 -0.23 93
IV.LAV9.HHZ. 2020-03-17T21:40:25.07 0.6 undecidable manual S 136 16.6722 90 0.01 51
IV.VIVA.HHZ. 2020-03-17T21:40:25.81 0.3 undecidable manual S 102 17.9709 90 0.4 70
IV.MTCE.HHZ. 2020-03-17T21:40:24.02 0.1 undecidable manual P 30 30.4473 90 -0.25 93
IV.RDP.HHZ. 2020-03-17T21:40:24.09 0.3 undecidable manual S 102 12.876 101 0.04 76
IV.RCAV.EHZ. 2020-03-17T21:40:24.62 0.6 undecidable manual P 78 32.745 90 -0.01 49
IV.ROM9.HNZ. 2020-03-17T21:40:23.10 0.6 undecidable manual S 324 5.994 142 0.57 47
IV.RMP.HHZ. 2020-03-17T21:40:23.88 0.3 undecidable manual S 76 12.4764 104 -0.07 76
IV.MA9.HHZ. 2020-03-17T21:40:22.57 0.3 undecidable manual S 101 8.4804 128 -0.44 71
IV.VIVA.HHZ. 2020-03-17T21:40:22.35 0.3 undecidable manual P 102 17.9709 90 0 76
IV.LAV9.HHZ. 2020-03-17T21:40:22.50 0.3 undecidable manual P 136 16.6722 90 0.35 71
IV.RMP.HHZ. 2020-03-17T21:40:21.73 0.3 undecidable manual P 76 12.4764 104 0.22 74
IV.SAMA.EHZ. 2020-03-17T21:40:21.67 0.3 undecidable manual S 100 2.8971 161 -0.47 71
IV.RDP.HHZ. 2020-03-17T21:40:21.67 0.3 undecidable manual P 102 12.876 101 0.11 76
IV.MA9.HHZ. 2020-03-17T21:40:21.03 0.3 undecidable manual P 101 8.4804 128 0.07 77
IV.SAMA.EHZ. 2020-03-17T21:40:20.34 0.3 undecidable manual P 100 2.8971 161 -0.11 76
IV.ROM9.HNZ. 2020-03-17T21:40:20.93 0.1 undecidable manual P 324 5.994 142 0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:1.9 0.0007944447 1.7696 AML other m 2020-03-17T21:40:24.10
IV.RDP.HHN. ML:1.2 0.0001638422 0.4256 AML other m 2020-03-17T21:40:24.77
IV.RDP.HHE. ML:1.3 0.00018602544999999997 0.32 AML other m 2020-03-17T21:40:24.81
IV.LAV9.HNE. ML:2.1 0.0010421047500000001 0.8704 AML other m 2020-03-17T21:40:25.07
IV.RMP.HHE. ML:1.5 0.0003570376 0.2688 AML other m 2020-03-17T21:40:25.61
IV.VIVA.HHN. ML:1.7 0.00041502875 0.2176 AML other m 2020-03-17T21:40:26.05
IV.MTCE.HHE. ML:0.7 0.00002535238 0.6016 AML other m 2020-03-17T21:40:26.18
IV.VIVA.HHE. ML:1.8 0.000439092 0.2176 AML other m 2020-03-17T21:40:26.98
IV.LAV9.HHN. ML:1.6 0.00035456265 0.192 AML other m 2020-03-17T21:40:28.38
IV.LAV9.HNN. ML:1.6 0.0003641569 0.1792 AML other m 2020-03-17T21:40:28.38
IV.LAV9.HHE. ML:1.7 0.0004196634 0.2688 AML other m 2020-03-17T21:40:29.38
IV.MTCE.HHN. ML:0.8 0.000032146419999999996 0.3072 AML other m 2020-03-17T21:40:30.62
IV.CERT.HHN. ML:0.9 0.000023919285 0.1024 AML other m 2020-03-17T21:40:32.90
IV.CERT.HHE. ML:1.1 0.00004262243 0.3072 AML other m 2020-03-17T21:40:33.51
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